139347737 has 8 divisors (see below), whose sum is σ = 140878920. Its totient is φ = 137825280.

The previous prime is 139347727. The next prime is 139347749. The reversal of 139347737 is 737743931.

It can be written as a sum of positive squares in 4 ways, for example, as 1308736 + 138039001 = 1144^2 + 11749^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 139347737 - 2¹⁸ = 139085593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139347727) 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, 32939 + ... + 36927.

It is an arithmetic number, because the mean of its divisors is an integer number (17609865).

Almost surely, 2^139347737 is an apocalyptic number.

It is an amenable number.

139347737 is a deficient number, since it is larger than the sum of its proper divisors (1531183).

139347737 is a wasteful number, since it uses less digits than its factorization.

139347737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363.

The product of its digits is 333396, while the sum is 44.

The square root of 139347737 is about 11804.5642443929. The cubic root of 139347737 is about 518.4417565487.

The spelling of 139347737 in words is "one hundred thirty-nine million, three hundred forty-seven thousand, seven hundred thirty-seven".