107978591 has 4 divisors (see below), whose sum is σ = 123404112. Its totient is φ = 92553072.

The previous prime is 107978587. The next prime is 107978593. The reversal of 107978591 is 195879701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195879701 = 1567 ⋅125003.

It is a cyclic number.

It is not a de Polignac number, because 107978591 - 2² = 107978587 is a prime.

It is a super-2 number, since 2×107978591² = 23318752228690562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107978593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7712750 + ... + 7712763.

It is an arithmetic number, because the mean of its divisors is an integer number (30851028).

Almost surely, 2^107978591 is an apocalyptic number.

107978591 is a deficient number, since it is larger than the sum of its proper divisors (15425521).

107978591 is an equidigital number, since it uses as much as digits as its factorization.

107978591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15425520.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 107978591 is about 10391.2747533688. The cubic root of 107978591 is about 476.1888462247.

The spelling of 107978591 in words is "one hundred seven million, nine hundred seventy-eight thousand, five hundred ninety-one".