7976399 has 2 divisors, whose sum is σ = 7976400. Its totient is φ = 7976398.

The previous prime is 7976389. The next prime is 7976401. The reversal of 7976399 is 9936797.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7976399 is a prime.

Together with 7976401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7976329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3988199 + 3988200.

It is an arithmetic number, because the mean of its divisors is an integer number (3988200).

Almost surely, 2^7976399 is an apocalyptic number.

7976399 is a deficient number, since it is larger than the sum of its proper divisors (1).

7976399 is an equidigital number, since it uses as much as digits as its factorization.

7976399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 642978, while the sum is 50.

The square root of 7976399 is about 2824.2519363541. The cubic root of 7976399 is about 199.8031312771.

The spelling of 7976399 in words is "seven million, nine hundred seventy-six thousand, three hundred ninety-nine".