137213717 has 4 divisors (see below), whose sum is σ = 137243436. Its totient is φ = 137184000.

The previous prime is 137213693. The next prime is 137213737. The reversal of 137213717 is 717312731.

137213717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 717312731 = 47 ⋅15261973.

It can be written as a sum of positive squares in 2 ways, for example, as 57896881 + 79316836 = 7609^2 + 8906^2 .

It is a cyclic number.

It is not a de Polignac number, because 137213717 - 2²² = 133019413 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 (137213737) 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, 6284 + ... + 17717.

It is an arithmetic number, because the mean of its divisors is an integer number (34310859).

Almost surely, 2^137213717 is an apocalyptic number.

It is an amenable number.

137213717 is a deficient number, since it is larger than the sum of its proper divisors (29719).

137213717 is an equidigital number, since it uses as much as digits as its factorization.

137213717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29718.

The product of its digits is 6174, while the sum is 32.

The square root of 137213717 is about 11713.8258908010. The cubic root of 137213717 is about 515.7815976246.

The spelling of 137213717 in words is "one hundred thirty-seven million, two hundred thirteen thousand, seven hundred seventeen".