7881079 has 2 divisors, whose sum is σ = 7881080. Its totient is φ = 7881078.

The previous prime is 7881077. The next prime is 7881089. The reversal of 7881079 is 9701887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7881079 - 2¹ = 7881077 is a prime.

It is a super-2 number, since 2×7881079² = 124222812408482, which contains 22 as substring.

Together with 7881077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7881073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3940539 + 3940540.

It is an arithmetic number, because the mean of its divisors is an integer number (3940540).

Almost surely, 2^7881079 is an apocalyptic number.

7881079 is a deficient number, since it is larger than the sum of its proper divisors (1).

7881079 is an equidigital number, since it uses as much as digits as its factorization.

7881079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 7881079 is about 2807.3259518624. The cubic root of 7881079 is about 199.0040402200.

The spelling of 7881079 in words is "seven million, eight hundred eighty-one thousand, seventy-nine".