137659397 has 4 divisors (see below), whose sum is σ = 138996000. Its totient is φ = 136322796.

The previous prime is 137659367. The next prime is 137659399. The reversal of 137659397 is 793956731.

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 a de Polignac number, because none of the positive numbers 2^k-137659397 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 (137659399) 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, 668147 + ... + 668352.

It is an arithmetic number, because the mean of its divisors is an integer number (34749000).

Almost surely, 2^137659397 is an apocalyptic number.

It is an amenable number.

137659397 is a deficient number, since it is larger than the sum of its proper divisors (1336603).

137659397 is a wasteful number, since it uses less digits than its factorization.

137659397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336602.

The product of its digits is 1071630, while the sum is 50.

The square root of 137659397 is about 11732.8341418431. The cubic root of 137659397 is about 516.3394259858.

The spelling of 137659397 in words is "one hundred thirty-seven million, six hundred fifty-nine thousand, three hundred ninety-seven".