137667797 has 4 divisors (see below), whose sum is σ = 137705100. Its totient is φ = 137630496.

The previous prime is 137667779. The next prime is 137667809. The reversal of 137667797 is 797766731.

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 72607441 + 65060356 = 8521^2 + 8066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137667797 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 (137667767) 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, 12422 + ... + 20727.

It is an arithmetic number, because the mean of its divisors is an integer number (34426275).

Almost surely, 2^137667797 is an apocalyptic number.

It is an amenable number.

137667797 is a deficient number, since it is larger than the sum of its proper divisors (37303).

137667797 is an equidigital number, since it uses as much as digits as its factorization.

137667797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37302.

The product of its digits is 2333772, while the sum is 53.

The square root of 137667797 is about 11733.1921061576. The cubic root of 137667797 is about 516.3499281456.

The spelling of 137667797 in words is "one hundred thirty-seven million, six hundred sixty-seven thousand, seven hundred ninety-seven".