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149653 = 721379
BaseRepresentation
bin100100100010010101
321121021201
4210202111
514242103
63112501
71162210
oct444225
9247251
10149653
11a2489
1272731
135316a
143c777
152e51d
hex24895

149653 has 4 divisors (see below), whose sum is σ = 171040. Its totient is φ = 128268.

The previous prime is 149629. The next prime is 149689. The reversal of 149653 is 356941.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 356941 = 1327457.

It is not a de Polignac number, because 149653 - 213 = 141461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10683 + ... + 10696.

It is an arithmetic number, because the mean of its divisors is an integer number (42760).

2149653 is an apocalyptic number.

It is an amenable number.

149653 is a deficient number, since it is larger than the sum of its proper divisors (21387).

149653 is an equidigital number, since it uses as much as digits as its factorization.

149653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21386.

The product of its digits is 3240, while the sum is 28.

The square root of 149653 is about 386.8501001680. The cubic root of 149653 is about 53.0919254335.

The spelling of 149653 in words is "one hundred forty-nine thousand, six hundred fifty-three".

Divisors: 1 7 21379 149653