7913918 has 8 divisors (see below), whose sum is σ = 12495720. Its totient is φ = 3748680.

The previous prime is 7913911. The next prime is 7913923. The reversal of 7913918 is 8193197.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×7913918² = 125260196221448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 208261 = 7913918 / (7 + 9 + 1 + 3 + 9 + 1 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7913911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104093 + ... + 104168.

It is an arithmetic number, because the mean of its divisors is an integer number (1561965).

Almost surely, 2^7913918 is an apocalyptic number.

7913918 is a deficient number, since it is larger than the sum of its proper divisors (4581802).

7913918 is a wasteful number, since it uses less digits than its factorization.

7913918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208282.

The product of its digits is 13608, while the sum is 38.

The square root of 7913918 is about 2813.1686760662. The cubic root of 7913918 is about 199.2800615528.

The spelling of 7913918 in words is "seven million, nine hundred thirteen thousand, nine hundred eighteen".