149879865 has 16 divisors (see below), whose sum is σ = 239960448. Its totient is φ = 79885056.

The previous prime is 149879857. The next prime is 149879869. The reversal of 149879865 is 568978941.

It is not a de Polignac number, because 149879865 - 2³ = 149879857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149879869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40732 + ... + 44258.

It is an arithmetic number, because the mean of its divisors is an integer number (14997528).

Almost surely, 2^149879865 is an apocalyptic number.

149879865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

149879865 is a deficient number, since it is larger than the sum of its proper divisors (90080583).

149879865 is a wasteful number, since it uses less digits than its factorization.

149879865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6368.

The product of its digits is 4354560, while the sum is 57.

The square root of 149879865 is about 12242.5432406833. The cubic root of 149879865 is about 531.1873994980.

The spelling of 149879865 in words is "one hundred forty-nine million, eight hundred seventy-nine thousand, eight hundred sixty-five".