7718961 has 8 divisors (see below), whose sum is σ = 10739520. Its totient is φ = 4922192.

The previous prime is 7718941. The next prime is 7718981. The reversal of 7718961 is 1698177.

It is an interprime number because it is at equal distance from previous prime (7718941) and next prime (7718981).

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

It is a cyclic number.

It is not a de Polignac number, because 7718961 - 2⁶ = 7718897 is a prime.

It is a Curzon number.

7718961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7718941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55866 + ... + 56003.

It is an arithmetic number, because the mean of its divisors is an integer number (1342440).

Almost surely, 2^7718961 is an apocalyptic number.

It is an amenable number.

7718961 is a deficient number, since it is larger than the sum of its proper divisors (3020559).

7718961 is a wasteful number, since it uses less digits than its factorization.

7718961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111895.

The product of its digits is 21168, while the sum is 39.

The square root of 7718961 is about 2778.3018194573. The cubic root of 7718961 is about 197.6300356060.

The spelling of 7718961 in words is "seven million, seven hundred eighteen thousand, nine hundred sixty-one".