231267963877 has 2 divisors, whose sum is σ = 231267963878. Its totient is φ = 231267963876.

The previous prime is 231267963821. The next prime is 231267963887. The reversal of 231267963877 is 778369762132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197776767841 + 33491196036 = 444721^2 + 183006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231267963877 is a prime.

It is a super-2 number, since 2×231267963877² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231267963887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115633981938 + 115633981939.

It is an arithmetic number, because the mean of its divisors is an integer number (115633981939).

Almost surely, 2^231267963877 is an apocalyptic number.

It is an amenable number.

231267963877 is a deficient number, since it is larger than the sum of its proper divisors (1).

231267963877 is an equidigital number, since it uses as much as digits as its factorization.

231267963877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32006016, while the sum is 61.

The spelling of 231267963877 in words is "two hundred thirty-one billion, two hundred sixty-seven million, nine hundred sixty-three thousand, eight hundred seventy-seven".