391296901 has 2 divisors, whose sum is σ = 391296902. Its totient is φ = 391296900.

The previous prime is 391296889. The next prime is 391296959. The reversal of 391296901 is 109692193.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317766276 + 73530625 = 17826^2 + 8575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391296901 is a prime.

It is a super-2 number, since 2×391296901² = 306226529464407602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391296991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195648450 + 195648451.

It is an arithmetic number, because the mean of its divisors is an integer number (195648451).

Almost surely, 2^391296901 is an apocalyptic number.

It is an amenable number.

391296901 is a deficient number, since it is larger than the sum of its proper divisors (1).

391296901 is an equidigital number, since it uses as much as digits as its factorization.

391296901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 391296901 is about 19781.2259731292. The cubic root of 391296901 is about 731.4233199024.

The spelling of 391296901 in words is "three hundred ninety-one million, two hundred ninety-six thousand, nine hundred one".