402023399 has 4 divisors (see below), whose sum is σ = 402728040. Its totient is φ = 401318760.

The previous prime is 402023393. The next prime is 402023449. The reversal of 402023399 is 993320204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402023399 - 2²⁰ = 400974823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402023393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351464 + ... + 352605.

It is an arithmetic number, because the mean of its divisors is an integer number (100682010).

Almost surely, 2^402023399 is an apocalyptic number.

402023399 is a deficient number, since it is larger than the sum of its proper divisors (704641).

402023399 is an equidigital number, since it uses as much as digits as its factorization.

402023399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704640.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 402023399 is about 20050.5211652964. The cubic root of 402023399 is about 738.0465883491.

The spelling of 402023399 in words is "four hundred two million, twenty-three thousand, three hundred ninety-nine".