3722272391 has 4 divisors (see below), whose sum is σ = 3723075312. Its totient is φ = 3721469472.

The previous prime is 3722272373. The next prime is 3722272423. The reversal of 3722272391 is 1932722273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1932722273 = 109 ⋅17731397.

It is a cyclic number.

It is not a de Polignac number, because 3722272391 - 2¹⁴ = 3722256007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3722272361) 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, 394466 + ... + 403791.

It is an arithmetic number, because the mean of its divisors is an integer number (930768828).

Almost surely, 2^3722272391 is an apocalyptic number.

3722272391 is a deficient number, since it is larger than the sum of its proper divisors (802921).

3722272391 is an equidigital number, since it uses as much as digits as its factorization.

3722272391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802920.

The product of its digits is 63504, while the sum is 38.

The square root of 3722272391 is about 61010.4285429958. The cubic root of 3722272391 is about 1549.7776151294. Note that the first 3 decimals are identical.

The spelling of 3722272391 in words is "three billion, seven hundred twenty-two million, two hundred seventy-two thousand, three hundred ninety-one".