864297961 has 2 divisors, whose sum is σ = 864297962. Its totient is φ = 864297960.

The previous prime is 864297947. The next prime is 864298063. The reversal of 864297961 is 169792468.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681210000 + 183087961 = 26100^2 + 13531^2 .

It is a cyclic number.

It is not a de Polignac number, because 864297961 - 2⁹ = 864297449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864297899 and 864297908.

It is not a weakly prime, because it can be changed into another prime (864297461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432148980 + 432148981.

It is an arithmetic number, because the mean of its divisors is an integer number (432148981).

Almost surely, 2^864297961 is an apocalyptic number.

It is an amenable number.

864297961 is a deficient number, since it is larger than the sum of its proper divisors (1).

864297961 is an equidigital number, since it uses as much as digits as its factorization.

864297961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 864297961 is about 29398.9448960333. The cubic root of 864297961 is about 952.5501055429.

The spelling of 864297961 in words is "eight hundred sixty-four million, two hundred ninety-seven thousand, nine hundred sixty-one".