233081997 has 4 divisors (see below), whose sum is σ = 310776000. Its totient is φ = 155387996.

The previous prime is 233081993. The next prime is 233081999. The reversal of 233081997 is 799180332.

233081997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233081997 - 2² = 233081993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233081993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38846997 + ... + 38847002.

It is an arithmetic number, because the mean of its divisors is an integer number (77694000).

Almost surely, 2^233081997 is an apocalyptic number.

It is an amenable number.

233081997 is a deficient number, since it is larger than the sum of its proper divisors (77694003).

233081997 is an equidigital number, since it uses as much as digits as its factorization.

233081997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77694002.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 233081997 is about 15267.0231872490. The cubic root of 233081997 is about 615.4171246484.

The spelling of 233081997 in words is "two hundred thirty-three million, eighty-one thousand, nine hundred ninety-seven".