7990456447 has 2 divisors, whose sum is σ = 7990456448. Its totient is φ = 7990456446.

The previous prime is 7990456393. The next prime is 7990456469. The reversal of 7990456447 is 7446540997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7990456447 - 2⁷ = 7990456319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7990456547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3995228223 + 3995228224.

It is an arithmetic number, because the mean of its divisors is an integer number (3995228224).

Almost surely, 2^7990456447 is an apocalyptic number.

7990456447 is a deficient number, since it is larger than the sum of its proper divisors (1).

7990456447 is an equidigital number, since it uses as much as digits as its factorization.

7990456447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The square root of 7990456447 is about 89389.3530964398. The cubic root of 7990456447 is about 1999.2043874590.

The spelling of 7990456447 in words is "seven billion, nine hundred ninety million, four hundred fifty-six thousand, four hundred forty-seven".