74919871 has 4 divisors (see below), whose sum is σ = 80682952. Its totient is φ = 69156792.

The previous prime is 74919863. The next prime is 74919893. The reversal of 74919871 is 17891947.

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 74919871 - 2³ = 74919863 is a prime.

It is a super-2 number, since 2×74919871² = 11225974141313282, 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 (74919811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2881521 + ... + 2881546.

It is an arithmetic number, because the mean of its divisors is an integer number (20170738).

Almost surely, 2^74919871 is an apocalyptic number.

74919871 is a deficient number, since it is larger than the sum of its proper divisors (5763081).

74919871 is a wasteful number, since it uses less digits than its factorization.

74919871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763080.

The product of its digits is 127008, while the sum is 46.

The square root of 74919871 is about 8655.6265515559. The cubic root of 74919871 is about 421.5660937648.

The spelling of 74919871 in words is "seventy-four million, nine hundred nineteen thousand, eight hundred seventy-one".