7400399 has 2 divisors, whose sum is σ = 7400400. Its totient is φ = 7400398.

The previous prime is 7400381. The next prime is 7400453. The reversal of 7400399 is 9930047.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7400399 - 2¹² = 7396303 is a prime.

It is a Chen prime.

It is equal to p₅₀₁₉₈₉ and since 7400399 and 501989 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7400369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3700199 + 3700200.

It is an arithmetic number, because the mean of its divisors is an integer number (3700200).

Almost surely, 2^7400399 is an apocalyptic number.

7400399 is a deficient number, since it is larger than the sum of its proper divisors (1).

7400399 is an equidigital number, since it uses as much as digits as its factorization.

7400399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 7400399 is about 2720.3674384171. The cubic root of 7400399 is about 194.8730183591.

The spelling of 7400399 in words is "seven million, four hundred thousand, three hundred ninety-nine".