233172397 has 2 divisors, whose sum is σ = 233172398. Its totient is φ = 233172396.

The previous prime is 233172353. The next prime is 233172403. The reversal of 233172397 is 793271332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230007556 + 3164841 = 15166^2 + 1779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233172397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233172347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116586198 + 116586199.

It is an arithmetic number, because the mean of its divisors is an integer number (116586199).

Almost surely, 2^233172397 is an apocalyptic number.

It is an amenable number.

233172397 is a deficient number, since it is larger than the sum of its proper divisors (1).

233172397 is an equidigital number, since it uses as much as digits as its factorization.

233172397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 37.

The square root of 233172397 is about 15269.9835297881. The cubic root of 233172397 is about 615.4966767915.

The spelling of 233172397 in words is "two hundred thirty-three million, one hundred seventy-two thousand, three hundred ninety-seven".