139429737 has 6 divisors (see below), whose sum is σ = 201398522. Its totient is φ = 92953152.

The previous prime is 139429691. The next prime is 139429739. The reversal of 139429737 is 737924931.

139429737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 112275216 + 27154521 = 10596^2 + 5211^2 .

It is not a de Polignac number, because 139429737 - 2⁶ = 139429673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139429692 and 139429701.

It is not an unprimeable number, because it can be changed into a prime (139429739) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7746088 + ... + 7746105.

Almost surely, 2^139429737 is an apocalyptic number.

It is an amenable number.

139429737 is a deficient number, since it is larger than the sum of its proper divisors (61968785).

139429737 is a wasteful number, since it uses less digits than its factorization.

139429737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15492199 (or 15492196 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 139429737 is about 11808.0369664056. The cubic root of 139429737 is about 518.5434299805.

The spelling of 139429737 in words is "one hundred thirty-nine million, four hundred twenty-nine thousand, seven hundred thirty-seven".