336997391 has 2 divisors, whose sum is σ = 336997392. Its totient is φ = 336997390.

The previous prime is 336997361. The next prime is 336997411. The reversal of 336997391 is 193799633.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 336997391 - 2¹⁸ = 336735247 is a prime.

It is a super-2 number, since 2×336997391² = 227134483081613762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (336997361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168498695 + 168498696.

It is an arithmetic number, because the mean of its divisors is an integer number (168498696).

Almost surely, 2^336997391 is an apocalyptic number.

336997391 is a deficient number, since it is larger than the sum of its proper divisors (1).

336997391 is an equidigital number, since it uses as much as digits as its factorization.

336997391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 826686, while the sum is 50.

The square root of 336997391 is about 18357.4886899053. The cubic root of 336997391 is about 695.8925378798.

The spelling of 336997391 in words is "three hundred thirty-six million, nine hundred ninety-seven thousand, three hundred ninety-one".