139600009 has 2 divisors, whose sum is σ = 139600010. Its totient is φ = 139600008.

The previous prime is 139599931. The next prime is 139600033. The reversal of 139600009 is 900006931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97713225 + 41886784 = 9885^2 + 6472^2 .

It is a cyclic number.

It is not a de Polignac number, because 139600009 - 2⁹ = 139599497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139600009.

It is not a weakly prime, because it can be changed into another prime (139600609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69800004 + 69800005.

It is an arithmetic number, because the mean of its divisors is an integer number (69800005).

Almost surely, 2^139600009 is an apocalyptic number.

It is an amenable number.

139600009 is a deficient number, since it is larger than the sum of its proper divisors (1).

139600009 is an equidigital number, since it uses as much as digits as its factorization.

139600009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 139600009 is about 11815.2447710574. The cubic root of 139600009 is about 518.7544263618.

The spelling of 139600009 in words is "one hundred thirty-nine million, six hundred thousand, nine".