391107117 has 16 divisors (see below), whose sum is σ = 559146240. Its totient is φ = 242291712.

The previous prime is 391107113. The next prime is 391107127. The reversal of 391107117 is 711701193.

It is a happy number.

It is not a de Polignac number, because 391107117 - 2² = 391107113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391107113) 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 in 15 ways as a sum of consecutive naturals, for example, 44508 + ... + 52565.

It is an arithmetic number, because the mean of its divisors is an integer number (34946640).

Almost surely, 2^391107117 is an apocalyptic number.

It is an amenable number.

391107117 is a deficient number, since it is larger than the sum of its proper divisors (168039123).

391107117 is a wasteful number, since it uses less digits than its factorization.

391107117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97172.

The product of its (nonzero) digits is 1323, while the sum is 30.

The square root of 391107117 is about 19776.4283175704. The cubic root of 391107117 is about 731.3050508924.

The spelling of 391107117 in words is "three hundred ninety-one million, one hundred seven thousand, one hundred seventeen".