74149187 has 4 divisors (see below), whose sum is σ = 84741936. Its totient is φ = 63556440.

The previous prime is 74149111. The next prime is 74149199. The reversal of 74149187 is 78194147.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78194147 = 6907 ⋅11321.

It is a cyclic number.

It is not a de Polignac number, because 74149187 - 2¹² = 74145091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74149487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5296364 + ... + 5296377.

It is an arithmetic number, because the mean of its divisors is an integer number (21185484).

Almost surely, 2^74149187 is an apocalyptic number.

74149187 is a deficient number, since it is larger than the sum of its proper divisors (10592749).

74149187 is a wasteful number, since it uses less digits than its factorization.

74149187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10592748.

The product of its digits is 56448, while the sum is 41.

The square root of 74149187 is about 8610.9922192509. The cubic root of 74149187 is about 420.1155898783.

The spelling of 74149187 in words is "seventy-four million, one hundred forty-nine thousand, one hundred eighty-seven".