231869633 has 2 divisors, whose sum is σ = 231869634. Its totient is φ = 231869632.

The previous prime is 231869611. The next prime is 231869663. The reversal of 231869633 is 336968132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161594944 + 70274689 = 12712^2 + 8383^2 .

It is a cyclic number.

It is not a de Polignac number, because 231869633 - 2¹⁴ = 231853249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (231869663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115934816 + 115934817.

It is an arithmetic number, because the mean of its divisors is an integer number (115934817).

Almost surely, 2^231869633 is an apocalyptic number.

It is an amenable number.

231869633 is a deficient number, since it is larger than the sum of its proper divisors (1).

231869633 is an equidigital number, since it uses as much as digits as its factorization.

231869633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 41.

The square root of 231869633 is about 15227.2661039334. The cubic root of 231869633 is about 614.3482491103.

The spelling of 231869633 in words is "two hundred thirty-one million, eight hundred sixty-nine thousand, six hundred thirty-three".