107978919 has 16 divisors (see below), whose sum is σ = 156777600. Its totient is φ = 65844576.

The previous prime is 107978911. The next prime is 107978929. The reversal of 107978919 is 919879701.

It is not a de Polignac number, because 107978919 - 2³ = 107978911 is a prime.

It is a super-2 number, since 2×107978919² = 23318893896817122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107978911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31009 + ... + 34314.

It is an arithmetic number, because the mean of its divisors is an integer number (9798600).

Almost surely, 2^107978919 is an apocalyptic number.

107978919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

107978919 is a deficient number, since it is larger than the sum of its proper divisors (48798681).

107978919 is a wasteful number, since it uses less digits than its factorization.

107978919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65374.

The product of its (nonzero) digits is 285768, while the sum is 51.

The square root of 107978919 is about 10391.2905358286. The cubic root of 107978919 is about 476.1893283876.

The spelling of 107978919 in words is "one hundred seven million, nine hundred seventy-eight thousand, nine hundred nineteen".