74249618 has 4 divisors (see below), whose sum is σ = 111374430. Its totient is φ = 37124808.

The previous prime is 74249611. The next prime is 74249629. The reversal of 74249618 is 81694247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81694247 = 29 ⋅2817043.

It can be written as a sum of positive squares in only one way, i.e., 55905529 + 18344089 = 7477^2 + 4283^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74249611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18562403 + ... + 18562406.

Almost surely, 2^74249618 is an apocalyptic number.

74249618 is a deficient number, since it is larger than the sum of its proper divisors (37124812).

74249618 is a wasteful number, since it uses less digits than its factorization.

74249618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37124811.

The product of its digits is 96768, while the sum is 41.

The square root of 74249618 is about 8616.8218038903. The cubic root of 74249618 is about 420.3051788031.

The spelling of 74249618 in words is "seventy-four million, two hundred forty-nine thousand, six hundred eighteen".