1613927081 has 16 divisors (see below), whose sum is σ = 1769053440. Its totient is φ = 1463296320.

The previous prime is 1613927047. The next prime is 1613927099. The reversal of 1613927081 is 1807293161.

It is a cyclic number.

It is not a de Polignac number, because 1613927081 - 2¹⁰ = 1613926057 is a prime.

It is a super-2 number, since 2×1613927081² = 5209521245570361122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1613927881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1045196 + ... + 1046738.

It is an arithmetic number, because the mean of its divisors is an integer number (110565840).

Almost surely, 2^1613927081 is an apocalyptic number.

It is an amenable number.

1613927081 is a deficient number, since it is larger than the sum of its proper divisors (155126359).

1613927081 is a wasteful number, since it uses less digits than its factorization.

1613927081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1613927081 is about 40173.7113172283. The cubic root of 1613927081 is about 1172.9908822106.

The spelling of 1613927081 in words is "one billion, six hundred thirteen million, nine hundred twenty-seven thousand, eighty-one".