402620399 has 2 divisors, whose sum is σ = 402620400. Its totient is φ = 402620398.

The previous prime is 402620389. The next prime is 402620423. The reversal of 402620399 is 993026204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402620399 - 2¹² = 402616303 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 (402620389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201310199 + 201310200.

It is an arithmetic number, because the mean of its divisors is an integer number (201310200).

Almost surely, 2^402620399 is an apocalyptic number.

402620399 is a deficient number, since it is larger than the sum of its proper divisors (1).

402620399 is an equidigital number, since it uses as much as digits as its factorization.

402620399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 402620399 is about 20065.4030360718. The cubic root of 402620399 is about 738.4117378172.

The spelling of 402620399 in words is "four hundred two million, six hundred twenty thousand, three hundred ninety-nine".