1613138894 has 8 divisors (see below), whose sum is σ = 2475980760. Its totient is φ = 787811976.

The previous prime is 1613138881. The next prime is 1613138941. The reversal of 1613138894 is 4988313161.

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

It is a congruent number.

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, 9378629 + ... + 9378800.

It is an arithmetic number, because the mean of its divisors is an integer number (309497595).

Almost surely, 2^1613138894 is an apocalyptic number.

1613138894 is a deficient number, since it is larger than the sum of its proper divisors (862841866).

1613138894 is a wasteful number, since it uses less digits than its factorization.

1613138894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18757474.

The product of its digits is 124416, while the sum is 44.

The square root of 1613138894 is about 40163.9003833044. The cubic root of 1613138894 is about 1172.7999015233.

The spelling of 1613138894 in words is "one billion, six hundred thirteen million, one hundred thirty-eight thousand, eight hundred ninety-four".