74194489 has 2 divisors, whose sum is σ = 74194490. Its totient is φ = 74194488.

The previous prime is 74194457. The next prime is 74194507. The reversal of 74194489 is 98449147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54878464 + 19316025 = 7408^2 + 4395^2 .

It is an emirp because it is prime and its reverse (98449147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74194489 - 2⁵ = 74194457 is a prime.

It is a super-2 number, since 2×74194489² = 11009644395942242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74194429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37097244 + 37097245.

It is an arithmetic number, because the mean of its divisors is an integer number (37097245).

Almost surely, 2^74194489 is an apocalyptic number.

It is an amenable number.

74194489 is a deficient number, since it is larger than the sum of its proper divisors (1).

74194489 is an equidigital number, since it uses as much as digits as its factorization.

74194489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 74194489 is about 8613.6222926246. The cubic root of 74194489 is about 420.2011300467.

The spelling of 74194489 in words is "seventy-four million, one hundred ninety-four thousand, four hundred eighty-nine".