138683737 has 4 divisors (see below), whose sum is σ = 138882276. Its totient is φ = 138485200.

The previous prime is 138683731. The next prime is 138683747. The reversal of 138683737 is 737386831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79762761 + 58920976 = 8931^2 + 7676^2 .

It is a cyclic number.

It is not a de Polignac number, because 138683737 - 2¹¹ = 138681689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138683731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98218 + ... + 99619.

It is an arithmetic number, because the mean of its divisors is an integer number (34720569).

Almost surely, 2^138683737 is an apocalyptic number.

It is an amenable number.

138683737 is a deficient number, since it is larger than the sum of its proper divisors (198539).

138683737 is an equidigital number, since it uses as much as digits as its factorization.

138683737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198538.

The product of its digits is 508032, while the sum is 46.

The square root of 138683737 is about 11776.4059457884. The cubic root of 138683737 is about 517.6169768314.

The spelling of 138683737 in words is "one hundred thirty-eight million, six hundred eighty-three thousand, seven hundred thirty-seven".