137638757 has 4 divisors (see below), whose sum is σ = 137670816. Its totient is φ = 137606700.

The previous prime is 137638751. The next prime is 137638759. The reversal of 137638757 is 757836731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 137638757 - 2¹² = 137634661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137638751) 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, 8369 + ... + 18582.

It is an arithmetic number, because the mean of its divisors is an integer number (34417704).

Almost surely, 2^137638757 is an apocalyptic number.

It is an amenable number.

137638757 is a deficient number, since it is larger than the sum of its proper divisors (32059).

137638757 is an equidigital number, since it uses as much as digits as its factorization.

137638757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32058.

The product of its digits is 740880, while the sum is 47.

The square root of 137638757 is about 11731.9545259944. The cubic root of 137638757 is about 516.3136188641.

The spelling of 137638757 in words is "one hundred thirty-seven million, six hundred thirty-eight thousand, seven hundred fifty-seven".