74249279 has 4 divisors (see below), whose sum is σ = 79960776. Its totient is φ = 68537784.

The previous prime is 74249191. The next prime is 74249281. The reversal of 74249279 is 97294247.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 74249279 - 2¹² = 74245183 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 (74249579) 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, 2855729 + ... + 2855754.

It is an arithmetic number, because the mean of its divisors is an integer number (19990194).

Almost surely, 2^74249279 is an apocalyptic number.

74249279 is a deficient number, since it is larger than the sum of its proper divisors (5711497).

74249279 is a wasteful number, since it uses less digits than its factorization.

74249279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711496.

The product of its digits is 254016, while the sum is 44.

The square root of 74249279 is about 8616.8021330422. The cubic root of 74249279 is about 420.3045391425.

The spelling of 74249279 in words is "seventy-four million, two hundred forty-nine thousand, two hundred seventy-nine".