231223779097 has 2 divisors, whose sum is σ = 231223779098. Its totient is φ = 231223779096.

The previous prime is 231223779037. The next prime is 231223779113. The reversal of 231223779097 is 790977322132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230833163401 + 390615696 = 480451^2 + 19764^2 .

It is a cyclic number.

It is not a de Polignac number, because 231223779097 - 2⁷ = 231223778969 is a prime.

It is not a weakly prime, because it can be changed into another prime (231223779037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115611889548 + 115611889549.

It is an arithmetic number, because the mean of its divisors is an integer number (115611889549).

Almost surely, 2^231223779097 is an apocalyptic number.

It is an amenable number.

231223779097 is a deficient number, since it is larger than the sum of its proper divisors (1).

231223779097 is an equidigital number, since it uses as much as digits as its factorization.

231223779097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2000376, while the sum is 52.

The spelling of 231223779097 in words is "two hundred thirty-one billion, two hundred twenty-three million, seven hundred seventy-nine thousand, ninety-seven".