3972374817 has 4 divisors (see below), whose sum is σ = 5296499760. Its totient is φ = 2648249876.

The previous prime is 3972374801. The next prime is 3972374837. The reversal of 3972374817 is 7184732793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3972374817 - 2⁴ = 3972374801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3972374817.

It is not an unprimeable number, because it can be changed into a prime (3972374837) 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, 662062467 + ... + 662062472.

It is an arithmetic number, because the mean of its divisors is an integer number (1324124940).

Almost surely, 2^3972374817 is an apocalyptic number.

It is an amenable number.

3972374817 is a deficient number, since it is larger than the sum of its proper divisors (1324124943).

3972374817 is a wasteful number, since it uses less digits than its factorization.

3972374817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324124942.

The product of its digits is 1778112, while the sum is 51.

The square root of 3972374817 is about 63026.7785706996. The cubic root of 3972374817 is about 1583.7382531454.

The spelling of 3972374817 in words is "three billion, nine hundred seventy-two million, three hundred seventy-four thousand, eight hundred seventeen".