391349107 has 2 divisors, whose sum is σ = 391349108. Its totient is φ = 391349106.

The previous prime is 391349087. The next prime is 391349143. The reversal of 391349107 is 701943193.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 391349107 - 2¹⁵ = 391316339 is a prime.

It is not a weakly prime, because it can be changed into another prime (391347107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195674553 + 195674554.

It is an arithmetic number, because the mean of its divisors is an integer number (195674554).

Almost surely, 2^391349107 is an apocalyptic number.

391349107 is a deficient number, since it is larger than the sum of its proper divisors (1).

391349107 is an equidigital number, since it uses as much as digits as its factorization.

391349107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 391349107 is about 19782.5455136593. The cubic root of 391349107 is about 731.4558467703.

The spelling of 391349107 in words is "three hundred ninety-one million, three hundred forty-nine thousand, one hundred seven".