74491993 has 4 divisors (see below), whose sum is σ = 75541248. Its totient is φ = 73442740.

The previous prime is 74491987. The next prime is 74491999. The reversal of 74491993 is 39919447.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (74491987) and next prime (74491999).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74491993 is a prime.

It is a super-2 number, since 2×74491993² = 11098114042224098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74491999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524521 + ... + 524662.

It is an arithmetic number, because the mean of its divisors is an integer number (18885312).

Almost surely, 2^74491993 is an apocalyptic number.

It is an amenable number.

74491993 is a deficient number, since it is larger than the sum of its proper divisors (1049255).

74491993 is a wasteful number, since it uses less digits than its factorization.

74491993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049254.

The product of its digits is 244944, while the sum is 46.

The square root of 74491993 is about 8630.8744052964. The cubic root of 74491993 is about 420.7620198563.

The spelling of 74491993 in words is "seventy-four million, four hundred ninety-one thousand, nine hundred ninety-three".