74971947 has 4 divisors (see below), whose sum is σ = 99962600. Its totient is φ = 49981296.

The previous prime is 74971933. The next prime is 74971987. The reversal of 74971947 is 74917947.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 74971947 - 2⁸ = 74971691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74971896 and 74971905.

It is not an unprimeable number, because it can be changed into a prime (74971907) 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, 12495322 + ... + 12495327.

It is an arithmetic number, because the mean of its divisors is an integer number (24990650).

Almost surely, 2^74971947 is an apocalyptic number.

74971947 is a deficient number, since it is larger than the sum of its proper divisors (24990653).

74971947 is a wasteful number, since it uses less digits than its factorization.

74971947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24990652.

The product of its digits is 444528, while the sum is 48.

The square root of 74971947 is about 8658.6342456533. The cubic root of 74971947 is about 421.6637465015.

The spelling of 74971947 in words is "seventy-four million, nine hundred seventy-one thousand, nine hundred forty-seven".