1913683538 has 8 divisors (see below), whose sum is σ = 3091334988. Its totient is φ = 883238544.

The previous prime is 1913683529. The next prime is 1913683543. The reversal of 1913683538 is 8353863191.

It can be written as a sum of positive squares in 2 ways, for example, as 1816720129 + 96963409 = 42623^2 + 9847^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1913683538² = 7324369367224394888, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1913683492 and 1913683501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36801581 + ... + 36801632.

Almost surely, 2^1913683538 is an apocalyptic number.

1913683538 is a deficient number, since it is larger than the sum of its proper divisors (1177651450).

1913683538 is a wasteful number, since it uses less digits than its factorization.

1913683538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73603228.

The product of its digits is 466560, while the sum is 47.

The square root of 1913683538 is about 43745.6687913215. The cubic root of 1913683538 is about 1241.5285386117.

The spelling of 1913683538 in words is "one billion, nine hundred thirteen million, six hundred eighty-three thousand, five hundred thirty-eight".