402399619 has 2 divisors, whose sum is σ = 402399620. Its totient is φ = 402399618.

The previous prime is 402399617. The next prime is 402399659. The reversal of 402399619 is 916993204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402399619 - 2¹ = 402399617 is a prime.

It is a super-2 number, since 2×402399619² = 323850906742690322, which contains 22 as substring.

Together with 402399617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (402399611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201199809 + 201199810.

It is an arithmetic number, because the mean of its divisors is an integer number (201199810).

Almost surely, 2^402399619 is an apocalyptic number.

402399619 is a deficient number, since it is larger than the sum of its proper divisors (1).

402399619 is an equidigital number, since it uses as much as digits as its factorization.

402399619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 402399619 is about 20059.9007724365. The cubic root of 402399619 is about 738.2767418823.

The spelling of 402399619 in words is "four hundred two million, three hundred ninety-nine thousand, six hundred nineteen".