74871091 has 4 divisors (see below), whose sum is σ = 76894672. Its totient is φ = 72847512.

The previous prime is 74871089. The next prime is 74871101. The reversal of 74871091 is 19017847.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19017847 = 71 ⋅267857.

It is a cyclic number.

It is not a de Polignac number, because 74871091 - 2¹ = 74871089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 2023543 = 74871091 / (7 + 4 + 8 + 7 + 1 + 0 + 9 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74871091.

It is not an unprimeable number, because it can be changed into a prime (74371091) 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, 1011735 + ... + 1011808.

It is an arithmetic number, because the mean of its divisors is an integer number (19223668).

Almost surely, 2^74871091 is an apocalyptic number.

74871091 is a deficient number, since it is larger than the sum of its proper divisors (2023581).

74871091 is a wasteful number, since it uses less digits than its factorization.

74871091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023580.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 74871091 is about 8652.8082724628. The cubic root of 74871091 is about 421.4745806213.

The spelling of 74871091 in words is "seventy-four million, eight hundred seventy-one thousand, ninety-one".