74581149 has 4 divisors (see below), whose sum is σ = 99441536. Its totient is φ = 49720764.

The previous prime is 74581147. The next prime is 74581153. The reversal of 74581149 is 94118547.

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 not a de Polignac number, because 74581149 - 2¹ = 74581147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74581141) 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, 12430189 + ... + 12430194.

It is an arithmetic number, because the mean of its divisors is an integer number (24860384).

Almost surely, 2^74581149 is an apocalyptic number.

It is an amenable number.

74581149 is a deficient number, since it is larger than the sum of its proper divisors (24860387).

74581149 is a wasteful number, since it uses less digits than its factorization.

74581149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24860386.

The product of its digits is 40320, while the sum is 39.

The square root of 74581149 is about 8636.0378067723. The cubic root of 74581149 is about 420.9298164254.

The spelling of 74581149 in words is "seventy-four million, five hundred eighty-one thousand, one hundred forty-nine".