401879137 has 4 divisors (see below), whose sum is σ = 438413616. Its totient is φ = 365344660.

The previous prime is 401879123. The next prime is 401879143. The reversal of 401879137 is 731978104.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401879137 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 401879137.

It is not an unprimeable number, because it can be changed into a prime (401879197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18267223 + ... + 18267244.

It is an arithmetic number, because the mean of its divisors is an integer number (109603404).

Almost surely, 2^401879137 is an apocalyptic number.

It is an amenable number.

401879137 is a deficient number, since it is larger than the sum of its proper divisors (36534479).

401879137 is a wasteful number, since it uses less digits than its factorization.

401879137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36534478.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 401879137 is about 20046.9233799104. The cubic root of 401879137 is about 737.9582976218.

The spelling of 401879137 in words is "four hundred one million, eight hundred seventy-nine thousand, one hundred thirty-seven".