2392066721 has 4 divisors (see below), whose sum is σ = 2609527344. Its totient is φ = 2174606100.

The previous prime is 2392066709. The next prime is 2392066757. The reversal of 2392066721 is 1276602932.

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 a de Polignac number, because none of the positive numbers 2^k-2392066721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2392066771) 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, 108730295 + ... + 108730316.

It is an arithmetic number, because the mean of its divisors is an integer number (652381836).

Almost surely, 2^2392066721 is an apocalyptic number.

It is an amenable number.

2392066721 is a deficient number, since it is larger than the sum of its proper divisors (217460623).

2392066721 is a wasteful number, since it uses less digits than its factorization.

2392066721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217460622.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 2392066721 is about 48908.7591439407. The cubic root of 2392066721 is about 1337.3890499400.

The spelling of 2392066721 in words is "two billion, three hundred ninety-two million, sixty-six thousand, seven hundred twenty-one".