402117679 has 2 divisors, whose sum is σ = 402117680. Its totient is φ = 402117678.

The previous prime is 402117649. The next prime is 402117689. The reversal of 402117679 is 976711204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402117679 - 2¹¹ = 402115631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402117629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201058839 + 201058840.

It is an arithmetic number, because the mean of its divisors is an integer number (201058840).

Almost surely, 2^402117679 is an apocalyptic number.

402117679 is a deficient number, since it is larger than the sum of its proper divisors (1).

402117679 is an equidigital number, since it uses as much as digits as its factorization.

402117679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 402117679 is about 20052.8720885563. The cubic root of 402117679 is about 738.1042778550.

The spelling of 402117679 in words is "four hundred two million, one hundred seventeen thousand, six hundred seventy-nine".