7920913 has 32 divisors (see below), whose sum is σ = 10950912. Its totient is φ = 5529600.

The previous prime is 7920893. The next prime is 7920949. The reversal of 7920913 is 3190297.

It is a cyclic number.

It is not a de Polignac number, because 7920913 - 2⁹ = 7920401 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

7920913 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7920313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40945 + ... + 41137.

It is an arithmetic number, because the mean of its divisors is an integer number (342216).

Almost surely, 2^7920913 is an apocalyptic number.

It is an amenable number.

7920913 is a deficient number, since it is larger than the sum of its proper divisors (3029999).

7920913 is a wasteful number, since it uses less digits than its factorization.

7920913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 7920913 is about 2814.4116614312. The cubic root of 7920913 is about 199.3387578702.

The spelling of 7920913 in words is "seven million, nine hundred twenty thousand, nine hundred thirteen".