402327979 has 2 divisors, whose sum is σ = 402327980. Its totient is φ = 402327978.

The previous prime is 402327977. The next prime is 402327997. The reversal of 402327979 is 979723204.

It is a happy number.

Together with next prime (402327997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402327979 - 2¹ = 402327977 is a prime.

Together with 402327977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402327977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201163989 + 201163990.

It is an arithmetic number, because the mean of its divisors is an integer number (201163990).

Almost surely, 2^402327979 is an apocalyptic number.

402327979 is a deficient number, since it is larger than the sum of its proper divisors (1).

402327979 is an equidigital number, since it uses as much as digits as its factorization.

402327979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 402327979 is about 20058.1150410501. The cubic root of 402327979 is about 738.2329269926.

The spelling of 402327979 in words is "four hundred two million, three hundred twenty-seven thousand, nine hundred seventy-nine".