139519431529 has 9 divisors (see below), whose sum is σ = 140298803607. Its totient is φ = 138744371304.

The previous prime is 139519431503. The next prime is 139519431533. The reversal of 139519431529 is 925134915931.

The square root of 139519431529 is 373523.

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

It can be written as a sum of positive squares in only one way, i.e., 87329115225 + 52190316304 = 295515^2 + 228452^2 .

It is not a de Polignac number, because 139519431529 - 2³⁵ = 105159693161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139519431629) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 74330139 + ... + 74332015.

Almost surely, 2^139519431529 is an apocalyptic number.

139519431529 is the 373523-rd square number.

139519431529 is the 186762-nd centered octagonal number.

It is an amenable number.

139519431529 is a deficient number, since it is larger than the sum of its proper divisors (779372078).

139519431529 is an frugal number, since it uses more digits than its factorization.

139519431529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4152 (or 2076 counting only the distinct ones).

The product of its digits is 1312200, while the sum is 52.

The spelling of 139519431529 in words is "one hundred thirty-nine billion, five hundred nineteen million, four hundred thirty-one thousand, five hundred twenty-nine".