74479391 has 16 divisors (see below), whose sum is σ = 88485888. Its totient is φ = 61344000.

The previous prime is 74479367. The next prime is 74479393. The reversal of 74479391 is 19397447.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 74479391 - 2²² = 70285087 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 (74479393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31631 + ... + 33903.

It is an arithmetic number, because the mean of its divisors is an integer number (5530368).

Almost surely, 2^74479391 is an apocalyptic number.

74479391 is a deficient number, since it is larger than the sum of its proper divisors (14006497).

74479391 is a wasteful number, since it uses less digits than its factorization.

74479391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2462.

The product of its digits is 190512, while the sum is 44.

The square root of 74479391 is about 8630.1443209253. The cubic root of 74479391 is about 420.7382913910.

The spelling of 74479391 in words is "seventy-four million, four hundred seventy-nine thousand, three hundred ninety-one".