231782783 has 2 divisors, whose sum is σ = 231782784. Its totient is φ = 231782782.

The previous prime is 231782741. The next prime is 231782809. The reversal of 231782783 is 387287132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231782783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231782783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231782183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115891391 + 115891392.

It is an arithmetic number, because the mean of its divisors is an integer number (115891392).

Almost surely, 2^231782783 is an apocalyptic number.

231782783 is a deficient number, since it is larger than the sum of its proper divisors (1).

231782783 is an equidigital number, since it uses as much as digits as its factorization.

231782783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 231782783 is about 15224.4140445536. The cubic root of 231782783 is about 614.2715353007.

The spelling of 231782783 in words is "two hundred thirty-one million, seven hundred eighty-two thousand, seven hundred eighty-three".