402905971 has 6 divisors (see below), whose sum is σ = 436282980. Its totient is φ = 371913048.

The previous prime is 402905939. The next prime is 402905981. The reversal of 402905971 is 179509204.

It is not a de Polignac number, because 402905971 - 2⁵ = 402905939 is a prime.

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 402905971.

It is not an unprimeable number, because it can be changed into a prime (402905981) 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, 1191861 + ... + 1192198.

It is an arithmetic number, because the mean of its divisors is an integer number (72713830).

Almost surely, 2^402905971 is an apocalyptic number.

402905971 is a deficient number, since it is larger than the sum of its proper divisors (33377009).

402905971 is a wasteful number, since it uses less digits than its factorization.

402905971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384085 (or 2384072 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 402905971 is about 20072.5178042018. The cubic root of 402905971 is about 738.5862776414.

The spelling of 402905971 in words is "four hundred two million, nine hundred five thousand, nine hundred seventy-one".