139617601 has 2 divisors, whose sum is σ = 139617602. Its totient is φ = 139617600.

The previous prime is 139617581. The next prime is 139617607. The reversal of 139617601 is 106716931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 68046001 = 8460^2 + 8249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139617601 is a prime.

It is not a weakly prime, because it can be changed into another prime (139617607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69808800 + 69808801.

It is an arithmetic number, because the mean of its divisors is an integer number (69808801).

Almost surely, 2^139617601 is an apocalyptic number.

It is an amenable number.

139617601 is a deficient number, since it is larger than the sum of its proper divisors (1).

139617601 is an equidigital number, since it uses as much as digits as its factorization.

139617601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 139617601 is about 11815.9892095415. The cubic root of 139617601 is about 518.7762161038.

The spelling of 139617601 in words is "one hundred thirty-nine million, six hundred seventeen thousand, six hundred one".