7712891 has 2 divisors, whose sum is σ = 7712892. Its totient is φ = 7712890.

The previous prime is 7712857. The next prime is 7712897. The reversal of 7712891 is 1982177.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7712891 - 2¹⁸ = 7450747 is a prime.

It is not a weakly prime, because it can be changed into another prime (7712897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3856445 + 3856446.

It is an arithmetic number, because the mean of its divisors is an integer number (3856446).

Almost surely, 2^7712891 is an apocalyptic number.

7712891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7712891 is an equidigital number, since it uses as much as digits as its factorization.

7712891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 35.

The square root of 7712891 is about 2777.2092107006. The cubic root of 7712891 is about 197.5782182304.

The spelling of 7712891 in words is "seven million, seven hundred twelve thousand, eight hundred ninety-one".