139634553 has 8 divisors (see below), whose sum is σ = 195978400. Its totient is φ = 88190208.

The previous prime is 139634531. The next prime is 139634557. The reversal of 139634553 is 355436931.

139634553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139634553 - 2²⁴ = 122857337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139634557) 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, 1224808 + ... + 1224921.

It is an arithmetic number, because the mean of its divisors is an integer number (24497300).

Almost surely, 2^139634553 is an apocalyptic number.

It is an amenable number.

139634553 is a deficient number, since it is larger than the sum of its proper divisors (56343847).

139634553 is a wasteful number, since it uses less digits than its factorization.

139634553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449751.

The product of its digits is 145800, while the sum is 39.

The square root of 139634553 is about 11816.7065208543. The cubic root of 139634553 is about 518.7972113997.

The spelling of 139634553 in words is "one hundred thirty-nine million, six hundred thirty-four thousand, five hundred fifty-three".