237940013 has 2 divisors, whose sum is σ = 237940014. Its totient is φ = 237940012.

The previous prime is 237939997. The next prime is 237940033. The reversal of 237940013 is 310049732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161849284 + 76090729 = 12722^2 + 8723^2 .

It is a cyclic number.

It is not a de Polignac number, because 237940013 - 2⁴ = 237939997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (237940033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118970006 + 118970007.

It is an arithmetic number, because the mean of its divisors is an integer number (118970007).

Almost surely, 2^237940013 is an apocalyptic number.

It is an amenable number.

237940013 is a deficient number, since it is larger than the sum of its proper divisors (1).

237940013 is an equidigital number, since it uses as much as digits as its factorization.

237940013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 237940013 is about 15425.3043081814. The cubic root of 237940013 is about 619.6633734545.

Adding to 237940013 its reverse (310049732), we get a palindrome (547989745).

The spelling of 237940013 in words is "two hundred thirty-seven million, nine hundred forty thousand, thirteen".