402319919 has 2 divisors, whose sum is σ = 402319920. Its totient is φ = 402319918.

The previous prime is 402319849. The next prime is 402319969. The reversal of 402319919 is 919913204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402319919 is a prime.

It is a super-2 number, since 2×402319919² = 323722634448333122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402319969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201159959 + 201159960.

It is an arithmetic number, because the mean of its divisors is an integer number (201159960).

Almost surely, 2^402319919 is an apocalyptic number.

402319919 is a deficient number, since it is larger than the sum of its proper divisors (1).

402319919 is an equidigital number, since it uses as much as digits as its factorization.

402319919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 402319919 is about 20057.9141238564. The cubic root of 402319919 is about 738.2279971862.

The spelling of 402319919 in words is "four hundred two million, three hundred nineteen thousand, nine hundred nineteen".