109678857 has 4 divisors (see below), whose sum is σ = 146238480. Its totient is φ = 73119236.

The previous prime is 109678847. The next prime is 109678861. The reversal of 109678857 is 758876901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 109678857 - 2⁷ = 109678729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109678847) 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, 18279807 + ... + 18279812.

It is an arithmetic number, because the mean of its divisors is an integer number (36559620).

Almost surely, 2^109678857 is an apocalyptic number.

It is an amenable number.

109678857 is a deficient number, since it is larger than the sum of its proper divisors (36559623).

109678857 is an equidigital number, since it uses as much as digits as its factorization.

109678857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36559622.

The product of its (nonzero) digits is 846720, while the sum is 51.

The square root of 109678857 is about 10472.7673993076. The cubic root of 109678857 is about 478.6752490963.

The spelling of 109678857 in words is "one hundred nine million, six hundred seventy-eight thousand, eight hundred fifty-seven".