920881613 has 12 divisors (see below), whose sum is σ = 966467040. Its totient is φ = 877361496.

The previous prime is 920881609. The next prime is 920881639. The reversal of 920881613 is 316188029.

It is not a de Polignac number, because 920881613 - 2² = 920881609 is a prime.

It is a super-2 number, since 2×920881613² = 1696045890322963538, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920881603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135818 + ... + 142436.

It is an arithmetic number, because the mean of its divisors is an integer number (80538920).

Almost surely, 2^920881613 is an apocalyptic number.

It is an amenable number.

920881613 is a deficient number, since it is larger than the sum of its proper divisors (45585427).

920881613 is a wasteful number, since it uses less digits than its factorization.

920881613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928 (or 6905 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 920881613 is about 30346.0312561626. The cubic root of 920881613 is about 972.8993962220.

The spelling of 920881613 in words is "nine hundred twenty million, eight hundred eighty-one thousand, six hundred thirteen".