402939071 has 2 divisors, whose sum is σ = 402939072. Its totient is φ = 402939070.

The previous prime is 402939059. The next prime is 402939073. The reversal of 402939071 is 170939204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402939071 - 2¹⁰ = 402938047 is a prime.

Together with 402939073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402939073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201469535 + 201469536.

It is an arithmetic number, because the mean of its divisors is an integer number (201469536).

Almost surely, 2^402939071 is an apocalyptic number.

402939071 is a deficient number, since it is larger than the sum of its proper divisors (1).

402939071 is an equidigital number, since it uses as much as digits as its factorization.

402939071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 402939071 is about 20073.3422976843. The cubic root of 402939071 is about 738.6065028205.

The spelling of 402939071 in words is "four hundred two million, nine hundred thirty-nine thousand, seventy-one".