74347879 has 2 divisors, whose sum is σ = 74347880. Its totient is φ = 74347878.

The previous prime is 74347859. The next prime is 74347901. The reversal of 74347879 is 97874347.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74347879 - 2⁷ = 74347751 is a prime.

It is a super-2 number, since 2×74347879² = 11055214223597282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74347849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37173939 + 37173940.

It is an arithmetic number, because the mean of its divisors is an integer number (37173940).

Almost surely, 2^74347879 is an apocalyptic number.

74347879 is a deficient number, since it is larger than the sum of its proper divisors (1).

74347879 is an equidigital number, since it uses as much as digits as its factorization.

74347879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1185408, while the sum is 49.

The square root of 74347879 is about 8622.5216149338. The cubic root of 74347879 is about 420.4905059164.

The spelling of 74347879 in words is "seventy-four million, three hundred forty-seven thousand, eight hundred seventy-nine".