3972072291 has 8 divisors (see below), whose sum is σ = 5777559744. Its totient is φ = 2407316520.

The previous prime is 3972072289. The next prime is 3972072311. The reversal of 3972072291 is 1922702793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3972072291 - 2¹ = 3972072289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3972072991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60182881 + ... + 60182946.

It is an arithmetic number, because the mean of its divisors is an integer number (722194968).

Almost surely, 2^3972072291 is an apocalyptic number.

3972072291 is a deficient number, since it is larger than the sum of its proper divisors (1805487453).

3972072291 is a wasteful number, since it uses less digits than its factorization.

3972072291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120365841.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 3972072291 is about 63024.3785451312. The cubic root of 3972072291 is about 1583.6980476273.

The spelling of 3972072291 in words is "three billion, nine hundred seventy-two million, seventy-two thousand, two hundred ninety-one".