74981971 has 4 divisors (see below), whose sum is σ = 74999592. Its totient is φ = 74964352.

The previous prime is 74981969. The next prime is 74982013. The reversal of 74981971 is 17918947.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17918947 = 757 ⋅23671.

It is a cyclic number.

It is not a de Polignac number, because 74981971 - 2¹ = 74981969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74981371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1971 + ... + 12403.

It is an arithmetic number, because the mean of its divisors is an integer number (18749898).

Almost surely, 2^74981971 is an apocalyptic number.

74981971 is a deficient number, since it is larger than the sum of its proper divisors (17621).

74981971 is a wasteful number, since it uses less digits than its factorization.

74981971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17620.

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

The square root of 74981971 is about 8659.2130704816. The cubic root of 74981971 is about 421.6825382817.

The spelling of 74981971 in words is "seventy-four million, nine hundred eighty-one thousand, nine hundred seventy-one".