231686867 has 2 divisors, whose sum is σ = 231686868. Its totient is φ = 231686866.

The previous prime is 231686837. The next prime is 231686891. The reversal of 231686867 is 768686132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231686867 - 2¹² = 231682771 is a prime.

It is not a weakly prime, because it can be changed into another prime (231686827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115843433 + 115843434.

It is an arithmetic number, because the mean of its divisors is an integer number (115843434).

Almost surely, 2^231686867 is an apocalyptic number.

231686867 is a deficient number, since it is larger than the sum of its proper divisors (1).

231686867 is an equidigital number, since it uses as much as digits as its factorization.

231686867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 231686867 is about 15221.2636466228. The cubic root of 231686867 is about 614.1867913048.

The spelling of 231686867 in words is "two hundred thirty-one million, six hundred eighty-six thousand, eight hundred sixty-seven".