402404371 has 2 divisors, whose sum is σ = 402404372. Its totient is φ = 402404370.

The previous prime is 402404311. The next prime is 402404383. The reversal of 402404371 is 173404204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402404371 - 2⁷ = 402404243 is a prime.

It is not a weakly prime, because it can be changed into another prime (402404311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201202185 + 201202186.

It is an arithmetic number, because the mean of its divisors is an integer number (201202186).

Almost surely, 2^402404371 is an apocalyptic number.

402404371 is a deficient number, since it is larger than the sum of its proper divisors (1).

402404371 is an equidigital number, since it uses as much as digits as its factorization.

402404371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 402404371 is about 20060.0192173388. The cubic root of 402404371 is about 738.2796480127.

Adding to 402404371 its reverse (173404204), we get a palindrome (575808575).

The spelling of 402404371 in words is "four hundred two million, four hundred four thousand, three hundred seventy-one".