154979881 has 16 divisors (see below), whose sum is σ = 184038400. Its totient is φ = 127707840.

The previous prime is 154979879. The next prime is 154979887. The reversal of 154979881 is 188979451.

154979881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 154979881 - 2¹ = 154979879 is a prime.

It is a super-3 number, since 3×154979881³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (154979887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31795 + ... + 36343.

It is an arithmetic number, because the mean of its divisors is an integer number (11502400).

Almost surely, 2^154979881 is an apocalyptic number.

It is an amenable number.

154979881 is a deficient number, since it is larger than the sum of its proper divisors (29058519).

154979881 is a wasteful number, since it uses less digits than its factorization.

154979881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4744.

The product of its digits is 725760, while the sum is 52.

The square root of 154979881 is about 12449.0915732836. The cubic root of 154979881 is about 537.1452929969.

The spelling of 154979881 in words is "one hundred fifty-four million, nine hundred seventy-nine thousand, eight hundred eighty-one".