154878971 has 4 divisors (see below), whose sum is σ = 166792752. Its totient is φ = 142965192.

The previous prime is 154878967. The next prime is 154878979. The reversal of 154878971 is 179878451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179878451 = 67 ⋅2684753.

It is a cyclic number.

It is not a de Polignac number, because 154878971 - 2² = 154878967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154878979) 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 3 ways as a sum of consecutive naturals, for example, 5956871 + ... + 5956896.

It is an arithmetic number, because the mean of its divisors is an integer number (41698188).

Almost surely, 2^154878971 is an apocalyptic number.

154878971 is a deficient number, since it is larger than the sum of its proper divisors (11913781).

154878971 is a wasteful number, since it uses less digits than its factorization.

154878971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11913780.

The product of its digits is 564480, while the sum is 50.

The square root of 154878971 is about 12445.0380071738. The cubic root of 154878971 is about 537.0286862484.

The spelling of 154878971 in words is "one hundred fifty-four million, eight hundred seventy-eight thousand, nine hundred seventy-one".