109139697 has 8 divisors (see below), whose sum is σ = 161688480. Its totient is φ = 72759780.

The previous prime is 109139689. The next prime is 109139707. The reversal of 109139697 is 796931901.

It is not a de Polignac number, because 109139697 - 2³ = 109139689 is a prime.

It is a super-2 number, since 2×109139697² = 23822946922503618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (109139617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021079 + ... + 2021132.

It is an arithmetic number, because the mean of its divisors is an integer number (20211060).

Almost surely, 2^109139697 is an apocalyptic number.

It is an amenable number.

109139697 is a deficient number, since it is larger than the sum of its proper divisors (52548783).

109139697 is an equidigital number, since it uses as much as digits as its factorization.

109139697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042220 (or 4042214 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 109139697 is about 10446.9946396081. The cubic root of 109139697 is about 477.8896020789.

The spelling of 109139697 in words is "one hundred nine million, one hundred thirty-nine thousand, six hundred ninety-seven".