139654957 has 8 divisors (see below), whose sum is σ = 150537240. Its totient is φ = 128792640.

The previous prime is 139654951. The next prime is 139654961. The reversal of 139654957 is 759456931.

It can be written as a sum of positive squares in 4 ways, for example, as 17464041 + 122190916 = 4179^2 + 11054^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139654957 - 2²³ = 131266349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139654957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139654951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11607 + ... + 20347.

It is an arithmetic number, because the mean of its divisors is an integer number (18817155).

Almost surely, 2^139654957 is an apocalyptic number.

It is an amenable number.

139654957 is a deficient number, since it is larger than the sum of its proper divisors (10882283).

139654957 is a wasteful number, since it uses less digits than its factorization.

139654957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9983.

The product of its digits is 1020600, while the sum is 49.

The square root of 139654957 is about 11817.5698432461. The cubic root of 139654957 is about 518.8224797938.

The spelling of 139654957 in words is "one hundred thirty-nine million, six hundred fifty-four thousand, nine hundred fifty-seven".