9722097391 has 2 divisors, whose sum is σ = 9722097392. Its totient is φ = 9722097390.

The previous prime is 9722097313. The next prime is 9722097397. The reversal of 9722097391 is 1937902279.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9722097391 - 2¹⁵ = 9722064623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9722097397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4861048695 + 4861048696.

It is an arithmetic number, because the mean of its divisors is an integer number (4861048696).

Almost surely, 2^9722097391 is an apocalyptic number.

9722097391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9722097391 is an equidigital number, since it uses as much as digits as its factorization.

9722097391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 9722097391 is about 98600.6967064635. The cubic root of 9722097391 is about 2134.2894736298.

The spelling of 9722097391 in words is "nine billion, seven hundred twenty-two million, ninety-seven thousand, three hundred ninety-one".