109939129 has 2 divisors, whose sum is σ = 109939130. Its totient is φ = 109939128.

The previous prime is 109939097. The next prime is 109939171. The reversal of 109939129 is 921939901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 27583504 = 9075^2 + 5252^2 .

It is a cyclic number.

It is not a de Polignac number, because 109939129 - 2⁵ = 109939097 is a prime.

It is a super-2 number, since 2×109939129² = 24173224170557282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (109939729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54969564 + 54969565.

It is an arithmetic number, because the mean of its divisors is an integer number (54969565).

Almost surely, 2^109939129 is an apocalyptic number.

It is an amenable number.

109939129 is a deficient number, since it is larger than the sum of its proper divisors (1).

109939129 is an equidigital number, since it uses as much as digits as its factorization.

109939129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 43.

The square root of 109939129 is about 10485.1861690673. The cubic root of 109939129 is about 479.0535880295.

The spelling of 109939129 in words is "one hundred nine million, nine hundred thirty-nine thousand, one hundred twenty-nine".