137216817 has 6 divisors (see below), whose sum is σ = 198202082. Its totient is φ = 91477872.

The previous prime is 137216813. The next prime is 137216837. The reversal of 137216817 is 718612731.

It can be written as a sum of positive squares in only one way, i.e., 90554256 + 46662561 = 9516^2 + 6831^2 .

It is not a de Polignac number, because 137216817 - 2² = 137216813 is a prime.

It is a super-2 number, since 2×137216817² = 37656909735222978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137216813) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7623148 + ... + 7623165.

Almost surely, 2^137216817 is an apocalyptic number.

It is an amenable number.

137216817 is a deficient number, since it is larger than the sum of its proper divisors (60985265).

137216817 is a wasteful number, since it uses less digits than its factorization.

137216817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15246319 (or 15246316 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 137216817 is about 11713.9582123209. The cubic root of 137216817 is about 515.7854818595.

The spelling of 137216817 in words is "one hundred thirty-seven million, two hundred sixteen thousand, eight hundred seventeen".