139639099 has 2 divisors, whose sum is σ = 139639100. Its totient is φ = 139639098.

The previous prime is 139639091. The next prime is 139639109. The reversal of 139639099 is 990936931.

It is a happy number.

139639099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139639099 - 2³ = 139639091 is a prime.

It is not a weakly prime, because it can be changed into another prime (139639091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69819549 + 69819550.

It is an arithmetic number, because the mean of its divisors is an integer number (69819550).

Almost surely, 2^139639099 is an apocalyptic number.

139639099 is a deficient number, since it is larger than the sum of its proper divisors (1).

139639099 is an equidigital number, since it uses as much as digits as its factorization.

139639099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 354294, while the sum is 49.

The square root of 139639099 is about 11816.8988740701. The cubic root of 139639099 is about 518.8028413971.

The spelling of 139639099 in words is "one hundred thirty-nine million, six hundred thirty-nine thousand, ninety-nine".