233723989 has 2 divisors, whose sum is σ = 233723990. Its totient is φ = 233723988.

The previous prime is 233723983. The next prime is 233724017. The reversal of 233723989 is 989327332.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164916964 + 68807025 = 12842^2 + 8295^2 .

It is a cyclic number.

It is not a de Polignac number, because 233723989 - 2³ = 233723981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233723981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116861994 + 116861995.

It is an arithmetic number, because the mean of its divisors is an integer number (116861995).

Almost surely, 2^233723989 is an apocalyptic number.

It is an amenable number.

233723989 is a deficient number, since it is larger than the sum of its proper divisors (1).

233723989 is an equidigital number, since it uses as much as digits as its factorization.

233723989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 46.

The square root of 233723989 is about 15288.0341770942. The cubic root of 233723989 is about 615.9816336867.

The spelling of 233723989 in words is "two hundred thirty-three million, seven hundred twenty-three thousand, nine hundred eighty-nine".