231772701689 has 2 divisors, whose sum is σ = 231772701690. Its totient is φ = 231772701688.

The previous prime is 231772701673. The next prime is 231772701767. The reversal of 231772701689 is 986107277132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127906369600 + 103866332089 = 357640^2 + 322283^2 .

It is a cyclic number.

It is not a de Polignac number, because 231772701689 - 2⁴ = 231772701673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231772701689.

It is not a weakly prime, because it can be changed into another prime (231772701289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115886350844 + 115886350845.

It is an arithmetic number, because the mean of its divisors is an integer number (115886350845).

Almost surely, 2^231772701689 is an apocalyptic number.

It is an amenable number.

231772701689 is a deficient number, since it is larger than the sum of its proper divisors (1).

231772701689 is an equidigital number, since it uses as much as digits as its factorization.

231772701689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 53.

The spelling of 231772701689 in words is "two hundred thirty-one billion, seven hundred seventy-two million, seven hundred one thousand, six hundred eighty-nine".