391108797 has 8 divisors (see below), whose sum is σ = 579420480. Its totient is φ = 260739180.

The previous prime is 391108789. The next prime is 391108841. The reversal of 391108797 is 797801193.

It is not a de Polignac number, because 391108797 - 2³ = 391108789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391108727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7242729 + ... + 7242782.

It is an arithmetic number, because the mean of its divisors is an integer number (72427560).

Almost surely, 2^391108797 is an apocalyptic number.

It is an amenable number.

391108797 is a deficient number, since it is larger than the sum of its proper divisors (188311683).

391108797 is a wasteful number, since it uses less digits than its factorization.

391108797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14485520 (or 14485514 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 391108797 is about 19776.4707923330. The cubic root of 391108797 is about 731.3060979974.

The spelling of 391108797 in words is "three hundred ninety-one million, one hundred eight thousand, seven hundred ninety-seven".