2197125977 has 2 divisors, whose sum is σ = 2197125978. Its totient is φ = 2197125976.

The previous prime is 2197125947. The next prime is 2197125989. The reversal of 2197125977 is 7795217912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1813397056 + 383728921 = 42584^2 + 19589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197125977 - 2⁶ = 2197125913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2197125937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098562988 + 1098562989.

It is an arithmetic number, because the mean of its divisors is an integer number (1098562989).

Almost surely, 2^2197125977 is an apocalyptic number.

It is an amenable number.

2197125977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197125977 is an equidigital number, since it uses as much as digits as its factorization.

2197125977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 555660, while the sum is 50.

The square root of 2197125977 is about 46873.5103976649. The cubic root of 2197125977 is about 1300.0248470596.

The spelling of 2197125977 in words is "two billion, one hundred ninety-seven million, one hundred twenty-five thousand, nine hundred seventy-seven".