74978419 has 2 divisors, whose sum is σ = 74978420. Its totient is φ = 74978418.

The previous prime is 74978399. The next prime is 74978441. The reversal of 74978419 is 91487947.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74978419 - 2⁷ = 74978291 is a prime.

It is a super-2 number, since 2×74978419² = 11243526631479122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74978479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37489209 + 37489210.

It is an arithmetic number, because the mean of its divisors is an integer number (37489210).

Almost surely, 2^74978419 is an apocalyptic number.

74978419 is a deficient number, since it is larger than the sum of its proper divisors (1).

74978419 is an equidigital number, since it uses as much as digits as its factorization.

74978419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The square root of 74978419 is about 8659.0079685839. The cubic root of 74978419 is about 421.6758796142.

The spelling of 74978419 in words is "seventy-four million, nine hundred seventy-eight thousand, four hundred nineteen".