7974420399 has 12 divisors (see below), whose sum is σ = 12565753512. Its totient is φ = 4832982000.

The previous prime is 7974420347. The next prime is 7974420427. The reversal of 7974420399 is 9930244797.

It is a happy number.

It is not a de Polignac number, because 7974420399 - 2²³ = 7966031791 is a prime.

It is a super-3 number, since 3×7974420399³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7974420329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40274752 + ... + 40274949.

It is an arithmetic number, because the mean of its divisors is an integer number (1047146126).

Almost surely, 2^7974420399 is an apocalyptic number.

7974420399 is a deficient number, since it is larger than the sum of its proper divisors (4591333113).

7974420399 is a wasteful number, since it uses less digits than its factorization.

7974420399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80549718 (or 80549715 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The square root of 7974420399 is about 89299.6102959022. The cubic root of 7974420399 is about 1997.8660906084.

The spelling of 7974420399 in words is "seven billion, nine hundred seventy-four million, four hundred twenty thousand, three hundred ninety-nine".