149861879 has 4 divisors (see below), whose sum is σ = 155029560. Its totient is φ = 144694200.

The previous prime is 149861867. The next prime is 149861891. The reversal of 149861879 is 978168941.

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

It is an interprime number because it is at equal distance from previous prime (149861867) and next prime (149861891).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-149861879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149861879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149861839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2583797 + ... + 2583854.

It is an arithmetic number, because the mean of its divisors is an integer number (38757390).

Almost surely, 2^149861879 is an apocalyptic number.

149861879 is a deficient number, since it is larger than the sum of its proper divisors (5167681).

149861879 is an equidigital number, since it uses as much as digits as its factorization.

149861879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167680.

The product of its digits is 870912, while the sum is 53.

The square root of 149861879 is about 12241.8086490518. The cubic root of 149861879 is about 531.1661506603.

The spelling of 149861879 in words is "one hundred forty-nine million, eight hundred sixty-one thousand, eight hundred seventy-nine".