231199783 has 2 divisors, whose sum is σ = 231199784. Its totient is φ = 231199782.

The previous prime is 231199763. The next prime is 231199799. The reversal of 231199783 is 387991132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231199783 - 2⁵ = 231199751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231199723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115599891 + 115599892.

It is an arithmetic number, because the mean of its divisors is an integer number (115599892).

Almost surely, 2^231199783 is an apocalyptic number.

231199783 is a deficient number, since it is larger than the sum of its proper divisors (1).

231199783 is an equidigital number, since it uses as much as digits as its factorization.

231199783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 231199783 is about 15205.2551113094. The cubic root of 231199783 is about 613.7560800124.

The spelling of 231199783 in words is "two hundred thirty-one million, one hundred ninety-nine thousand, seven hundred eighty-three".