1864255697 has 2 divisors, whose sum is σ = 1864255698. Its totient is φ = 1864255696.

The previous prime is 1864255663. The next prime is 1864255721. The reversal of 1864255697 is 7965524681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1628203201 + 236052496 = 40351^2 + 15364^2 .

It is a cyclic number.

It is not a de Polignac number, because 1864255697 - 2¹⁶ = 1864190161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1864255297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 932127848 + 932127849.

It is an arithmetic number, because the mean of its divisors is an integer number (932127849).

Almost surely, 2^1864255697 is an apocalyptic number.

It is an amenable number.

1864255697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1864255697 is an equidigital number, since it uses as much as digits as its factorization.

1864255697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 53.

The square root of 1864255697 is about 43177.0274219984. The cubic root of 1864255697 is about 1230.7461700716.

The spelling of 1864255697 in words is "one billion, eight hundred sixty-four million, two hundred fifty-five thousand, six hundred ninety-seven".