2197765579 has 2 divisors, whose sum is σ = 2197765580. Its totient is φ = 2197765578.

The previous prime is 2197765547. The next prime is 2197765597. The reversal of 2197765579 is 9755677912.

Together with next prime (2197765597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2197765579 - 2⁵ = 2197765547 is a prime.

It is not a weakly prime, because it can be changed into another prime (2197765079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098882789 + 1098882790.

It is an arithmetic number, because the mean of its divisors is an integer number (1098882790).

Almost surely, 2^2197765579 is an apocalyptic number.

2197765579 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197765579 is an equidigital number, since it uses as much as digits as its factorization.

2197765579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8334900, while the sum is 58.

The square root of 2197765579 is about 46880.3325393496. The cubic root of 2197765579 is about 1300.1509842389.

The spelling of 2197765579 in words is "two billion, one hundred ninety-seven million, seven hundred sixty-five thousand, five hundred seventy-nine".