1613377994 has 8 divisors (see below), whose sum is σ = 2424016740. Its totient is φ = 805372416.

The previous prime is 1613377991. The next prime is 1613377999. The reversal of 1613377994 is 4997733161.

It can be written as a sum of positive squares in 2 ways, for example, as 1229413969 + 383964025 = 35063^2 + 19595^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1613377991) 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, 656759 + ... + 659210.

Almost surely, 2^1613377994 is an apocalyptic number.

1613377994 is a deficient number, since it is larger than the sum of its proper divisors (810638746).

1613377994 is a wasteful number, since it uses less digits than its factorization.

1613377994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1316584.

The product of its digits is 857304, while the sum is 50.

The square root of 1613377994 is about 40166.8768265595. The cubic root of 1613377994 is about 1172.8578429286.

The spelling of 1613377994 in words is "one billion, six hundred thirteen million, three hundred seventy-seven thousand, nine hundred ninety-four".