613697138 has 16 divisors (see below), whose sum is σ = 926559000. Its totient is φ = 304851072.

The previous prime is 613697129. The next prime is 613697179. The reversal of 613697138 is 831796316.

It can be written as a sum of positive squares in 4 ways, for example, as 542750209 + 70946929 = 23297^2 + 8423^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218648 + ... + 221436.

Almost surely, 2^613697138 is an apocalyptic number.

613697138 is a deficient number, since it is larger than the sum of its proper divisors (312861862).

613697138 is a wasteful number, since it uses less digits than its factorization.

613697138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469.

The product of its digits is 163296, while the sum is 44.

The square root of 613697138 is about 24772.9113751291. The cubic root of 613697138 is about 849.8025552929.

The spelling of 613697138 in words is "six hundred thirteen million, six hundred ninety-seven thousand, one hundred thirty-eight".