402313291 has 2 divisors, whose sum is σ = 402313292. Its totient is φ = 402313290.

The previous prime is 402313283. The next prime is 402313333. The reversal of 402313291 is 192313204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402313291 - 2³ = 402313283 is a prime.

It is not a weakly prime, because it can be changed into another prime (402311291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201156645 + 201156646.

It is an arithmetic number, because the mean of its divisors is an integer number (201156646).

Almost surely, 2^402313291 is an apocalyptic number.

402313291 is a deficient number, since it is larger than the sum of its proper divisors (1).

402313291 is an equidigital number, since it uses as much as digits as its factorization.

402313291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 402313291 is about 20057.7489016091. The cubic root of 402313291 is about 738.2239431968.

Adding to 402313291 its reverse (192313204), we get a palindrome (594626495).

The spelling of 402313291 in words is "four hundred two million, three hundred thirteen thousand, two hundred ninety-one".