8445597091 has 2 divisors, whose sum is σ = 8445597092. Its totient is φ = 8445597090.

The previous prime is 8445596993. The next prime is 8445597101. The reversal of 8445597091 is 1907955448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8445597091 - 2²⁵ = 8412042659 is a prime.

It is a super-2 number, since 2×8445597091² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8445597491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4222798545 + 4222798546.

It is an arithmetic number, because the mean of its divisors is an integer number (4222798546).

Almost surely, 2^8445597091 is an apocalyptic number.

8445597091 is a deficient number, since it is larger than the sum of its proper divisors (1).

8445597091 is an equidigital number, since it uses as much as digits as its factorization.

8445597091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The square root of 8445597091 is about 91899.9297660232. The cubic root of 8445597091 is about 2036.4642305049.

The spelling of 8445597091 in words is "eight billion, four hundred forty-five million, five hundred ninety-seven thousand, ninety-one".