74070891 has 12 divisors (see below), whose sum is σ = 107548168. Its totient is φ = 49123584.

The previous prime is 74070889. The next prime is 74070907. The reversal of 74070891 is 19807047.

It is not a de Polignac number, because 74070891 - 2¹ = 74070889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74070881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19585 + ... + 23058.

Almost surely, 2^74070891 is an apocalyptic number.

74070891 is a deficient number, since it is larger than the sum of its proper divisors (33477277).

74070891 is a wasteful number, since it uses less digits than its factorization.

74070891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42842 (or 42839 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 74070891 is about 8606.4447363589. Note that the first 3 decimals coincide. The cubic root of 74070891 is about 419.9676675791.

It can be divided in two parts, 740 and 70891, that added together give a triangular number (71631 = T₃₇₈).

The spelling of 74070891 in words is "seventy-four million, seventy thousand, eight hundred ninety-one".