1613887913 has 4 divisors (see below), whose sum is σ = 1760605008. Its totient is φ = 1467170820.

The previous prime is 1613887909. The next prime is 1613887921. The reversal of 1613887913 is 3197883161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1613887913 - 2² = 1613887909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1613887213) 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, 73358531 + ... + 73358552.

It is an arithmetic number, because the mean of its divisors is an integer number (440151252).

Almost surely, 2^1613887913 is an apocalyptic number.

It is an amenable number.

1613887913 is a deficient number, since it is larger than the sum of its proper divisors (146717095).

1613887913 is a wasteful number, since it uses less digits than its factorization.

1613887913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146717094.

The product of its digits is 217728, while the sum is 47.

The square root of 1613887913 is about 40173.2238313034. The cubic root of 1613887913 is about 1172.9813931246.

The spelling of 1613887913 in words is "one billion, six hundred thirteen million, eight hundred eighty-seven thousand, nine hundred thirteen".