231977643607207 has 2 divisors, whose sum is σ = 231977643607208. Its totient is φ = 231977643607206.

The previous prime is 231977643607139. The next prime is 231977643607223. The reversal of 231977643607207 is 702706346779132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231977643607207 - 2¹⁹ = 231977643082919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231977643607267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115988821803603 + 115988821803604.

It is an arithmetic number, because the mean of its divisors is an integer number (115988821803604).

Almost surely, 2^{231977643607207} is an apocalyptic number.

231977643607207 is a deficient number, since it is larger than the sum of its proper divisors (1).

231977643607207 is an equidigital number, since it uses as much as digits as its factorization.

231977643607207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112021056, while the sum is 64.

The spelling of 231977643607207 in words is "two hundred thirty-one trillion, nine hundred seventy-seven billion, six hundred forty-three million, six hundred seven thousand, two hundred seven".