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149887 = 374051
BaseRepresentation
bin100100100101111111
321121121101
4210211333
514244022
63113531
71162663
oct444577
9247541
10149887
11a2681
12728a7
13532ba
143c8a3
152e627
hex2497f

149887 has 4 divisors (see below), whose sum is σ = 153976. Its totient is φ = 145800.

The previous prime is 149873. The next prime is 149893. The reversal of 149887 is 788941.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 149887 - 27 = 149759 is a prime.

It is a super-2 number, since 2×1498872 = 44932225538, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 4051 = 149887 / (1 + 4 + 9 + 8 + 8 + 7).

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989 + ... + 2062.

It is an arithmetic number, because the mean of its divisors is an integer number (38494).

2149887 is an apocalyptic number.

149887 is a deficient number, since it is larger than the sum of its proper divisors (4089).

149887 is an equidigital number, since it uses as much as digits as its factorization.

149887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088.

The product of its digits is 16128, while the sum is 37.

The square root of 149887 is about 387.1524247632. The cubic root of 149887 is about 53.1195828386.

The spelling of 149887 in words is "one hundred forty-nine thousand, eight hundred eighty-seven".

Divisors: 1 37 4051 149887