401992893 has 6 divisors (see below), whose sum is σ = 580656414. Its totient is φ = 267995256.

The previous prime is 401992859. The next prime is 401992933. The reversal of 401992893 is 398299104.

It can be written as a sum of positive squares in only one way, i.e., 380952324 + 21040569 = 19518^2 + 4587^2 .

It is not a de Polignac number, because 401992893 - 2⁸ = 401992637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401992813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22332930 + ... + 22332947.

It is an arithmetic number, because the mean of its divisors is an integer number (96776069).

Almost surely, 2^401992893 is an apocalyptic number.

It is an amenable number.

401992893 is a deficient number, since it is larger than the sum of its proper divisors (178663521).

401992893 is a wasteful number, since it uses less digits than its factorization.

401992893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44665883 (or 44665880 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 401992893 is about 20049.7604225088. The cubic root of 401992893 is about 738.0279199343.

The spelling of 401992893 in words is "four hundred one million, nine hundred ninety-two thousand, eight hundred ninety-three".