402969871 has 2 divisors, whose sum is σ = 402969872. Its totient is φ = 402969870.

The previous prime is 402969817. The next prime is 402969881. The reversal of 402969871 is 178969204.

Together with previous prime (402969817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402969871 - 2²³ = 394581263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402969881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201484935 + 201484936.

It is an arithmetic number, because the mean of its divisors is an integer number (201484936).

Almost surely, 2^402969871 is an apocalyptic number.

402969871 is a deficient number, since it is larger than the sum of its proper divisors (1).

402969871 is an equidigital number, since it uses as much as digits as its factorization.

402969871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 402969871 is about 20074.1094696627. The cubic root of 402969871 is about 738.6253216299.

The spelling of 402969871 in words is "four hundred two million, nine hundred sixty-nine thousand, eight hundred seventy-one".