1613089813 has 4 divisors (see below), whose sum is σ = 1613189440. Its totient is φ = 1612990188.

The previous prime is 1613089787. The next prime is 1613089817. The reversal of 1613089813 is 3189803161.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3189803161 = 8713 ⋅366097.

It is a cyclic number.

It is not a de Polignac number, because 1613089813 - 2²⁵ = 1579535381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613089817) 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, 19293 + ... + 59986.

It is an arithmetic number, because the mean of its divisors is an integer number (403297360).

Almost surely, 2^1613089813 is an apocalyptic number.

It is an amenable number.

1613089813 is a deficient number, since it is larger than the sum of its proper divisors (99627).

1613089813 is an equidigital number, since it uses as much as digits as its factorization.

1613089813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99626.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1613089813 is about 40163.2893697715. The cubic root of 1613089813 is about 1172.7880069543.

The spelling of 1613089813 in words is "one billion, six hundred thirteen million, eighty-nine thousand, eight hundred thirteen".