139090956601 has 9 divisors (see below), whose sum is σ = 139565843053. Its totient is φ = 138617684320.

The previous prime is 139090956583. The next prime is 139090956617. The reversal of 139090956601 is 106659090931.

The square root of 139090956601 is 372949.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8408706601 + 130682250000 = 91699^2 + 361500^2 .

It is not a de Polignac number, because 139090956601 - 2²⁹ = 138554085689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139090954601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 171929085 + ... + 171929893.

Almost surely, 2^139090956601 is an apocalyptic number.

139090956601 is the 372949-th square number.

139090956601 is the 186475-th centered octagonal number.

It is an amenable number.

139090956601 is a deficient number, since it is larger than the sum of its proper divisors (474886452).

139090956601 is an frugal number, since it uses more digits than its factorization.

139090956601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540 (or 1270 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 49.

Multiplying 139090956601 by its sum of digits (49), we get a square (6815456873449 = 2610643²).

The spelling of 139090956601 in words is "one hundred thirty-nine billion, ninety million, nine hundred fifty-six thousand, six hundred one".