74555971 has 4 divisors (see below), whose sum is σ = 85206832. Its totient is φ = 63905112.

The previous prime is 74555963. The next prime is 74555977. The reversal of 74555971 is 17955547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17955547 = 1319 ⋅13613.

It is a cyclic number.

It is not a de Polignac number, because 74555971 - 2³ = 74555963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74555977) 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, 5325420 + ... + 5325433.

It is an arithmetic number, because the mean of its divisors is an integer number (21301708).

Almost surely, 2^74555971 is an apocalyptic number.

74555971 is a deficient number, since it is larger than the sum of its proper divisors (10650861).

74555971 is a wasteful number, since it uses less digits than its factorization.

74555971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650860.

The product of its digits is 220500, while the sum is 43.

The square root of 74555971 is about 8634.5799550412. The cubic root of 74555971 is about 420.8824435798.

The spelling of 74555971 in words is "seventy-four million, five hundred fifty-five thousand, nine hundred seventy-one".