11392597721 has 2 divisors, whose sum is σ = 11392597722. Its totient is φ = 11392597720.

The previous prime is 11392597709. The next prime is 11392597757. The reversal of 11392597721 is 12779529311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11392573696 + 24025 = 106736^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 11392597721 - 2¹⁴ = 11392581337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11392597621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5696298860 + 5696298861.

It is an arithmetic number, because the mean of its divisors is an integer number (5696298861).

Almost surely, 2^11392597721 is an apocalyptic number.

It is an amenable number.

11392597721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11392597721 is an equidigital number, since it uses as much as digits as its factorization.

11392597721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 238140, while the sum is 47.

The spelling of 11392597721 in words is "eleven billion, three hundred ninety-two million, five hundred ninety-seven thousand, seven hundred twenty-one".