237997 has 2 divisors, whose sum is σ = 237998. Its totient is φ = 237996.

The previous prime is 237977. The next prime is 238001. The reversal of 237997 is 799732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203401 + 34596 = 451^2 + 186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-237997 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 2⁹ + 3⁶ + 9³ + 7⁶ + 9³ + 7⁶ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (237967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118998 + 118999.

It is an arithmetic number, because the mean of its divisors is an integer number (118999).

2²³⁷⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

237997 is a deficient number, since it is larger than the sum of its proper divisors (1).

237997 is an equidigital number, since it uses as much as digits as its factorization.

237997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 37.

The square root of 237997 is about 487.8493619961. The cubic root of 237997 is about 61.9712839617.

The spelling of 237997 in words is "two hundred thirty-seven thousand, nine hundred ninety-seven".