2137659197 has 4 divisors (see below), whose sum is σ = 2137789500. Its totient is φ = 2137528896.

The previous prime is 2137659193. The next prime is 2137659233. The reversal of 2137659197 is 7919567312.

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 1679442361 + 458216836 = 40981^2 + 21406^2 .

It is a cyclic number.

It is not a de Polignac number, because 2137659197 - 2² = 2137659193 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 (2137659191) 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, 36278 + ... + 74775.

It is an arithmetic number, because the mean of its divisors is an integer number (534447375).

Almost surely, 2^2137659197 is an apocalyptic number.

It is an amenable number.

2137659197 is a deficient number, since it is larger than the sum of its proper divisors (130303).

2137659197 is a wasteful number, since it uses less digits than its factorization.

2137659197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130302.

The product of its digits is 714420, while the sum is 50.

The square root of 2137659197 is about 46234.8266677837. The cubic root of 2137659197 is about 1288.1887118930.

The spelling of 2137659197 in words is "two billion, one hundred thirty-seven million, six hundred fifty-nine thousand, one hundred ninety-seven".