74327391 has 6 divisors (see below), whose sum is σ = 107361800. Its totient is φ = 49551588.

The previous prime is 74327389. The next prime is 74327399. The reversal of 74327391 is 19372347.

It is not a de Polignac number, because 74327391 - 2¹ = 74327389 is a prime.

It is a super-2 number, since 2×74327391² = 11049122105733762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74327399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4129291 + ... + 4129308.

Almost surely, 2^74327391 is an apocalyptic number.

74327391 is a deficient number, since it is larger than the sum of its proper divisors (33034409).

74327391 is a wasteful number, since it uses less digits than its factorization.

74327391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8258605 (or 8258602 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 74327391 is about 8621.3334815445. Note that the first 3 decimals coincide. The cubic root of 74327391 is about 420.4518775965.

The spelling of 74327391 in words is "seventy-four million, three hundred twenty-seven thousand, three hundred ninety-one".