139629729 has 16 divisors (see below), whose sum is σ = 190925504. Its totient is φ = 90720000.

The previous prime is 139629703. The next prime is 139629779. The reversal of 139629729 is 927926931.

139629729 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 139629729 - 2²⁰ = 138581153 is a prime.

It is a super-2 number, since 2×139629729² = 38992922441226882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139629779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76629 + ... + 78429.

It is an arithmetic number, because the mean of its divisors is an integer number (11932844).

Almost surely, 2^139629729 is an apocalyptic number.

It is an amenable number.

139629729 is a deficient number, since it is larger than the sum of its proper divisors (51295775).

139629729 is a wasteful number, since it uses less digits than its factorization.

139629729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448.

The product of its digits is 367416, while the sum is 48.

The square root of 139629729 is about 11816.5024013030. The cubic root of 139629729 is about 518.7912369793.

It can be divided in two parts, 1396 and 29729, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 139629729 in words is "one hundred thirty-nine million, six hundred twenty-nine thousand, seven hundred twenty-nine".