139681553 has 24 divisors (see below), whose sum is σ = 163404864. Its totient is φ = 119044640.

The previous prime is 139681543. The next prime is 139681579. The reversal of 139681553 is 355186931.

It is not a de Polignac number, because 139681553 - 2⁶ = 139681489 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 139681553.

It is not an unprimeable number, because it can be changed into a prime (139681543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147026 + ... + 147972.

It is an arithmetic number, because the mean of its divisors is an integer number (6808536).

Almost surely, 2^139681553 is an apocalyptic number.

It is an amenable number.

139681553 is a deficient number, since it is larger than the sum of its proper divisors (23723311).

139681553 is a wasteful number, since it uses less digits than its factorization.

139681553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 1034 counting only the distinct ones).

The product of its digits is 97200, while the sum is 41.

The square root of 139681553 is about 11818.6950633308. The cubic root of 139681553 is about 518.8554126905.

The spelling of 139681553 in words is "one hundred thirty-nine million, six hundred eighty-one thousand, five hundred fifty-three".