237138949 has 2 divisors, whose sum is σ = 237138950. Its totient is φ = 237138948.

The previous prime is 237138931. The next prime is 237138959. The reversal of 237138949 is 949831732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123609924 + 113529025 = 11118^2 + 10655^2 .

It is a cyclic number.

It is not a de Polignac number, because 237138949 - 2¹¹ = 237136901 is a prime.

It is a super-2 number, since 2×237138949² = 112469762265649202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 237138899 and 237138908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (237138919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118569474 + 118569475.

It is an arithmetic number, because the mean of its divisors is an integer number (118569475).

Almost surely, 2^237138949 is an apocalyptic number.

It is an amenable number.

237138949 is a deficient number, since it is larger than the sum of its proper divisors (1).

237138949 is an equidigital number, since it uses as much as digits as its factorization.

237138949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 237138949 is about 15399.3165108066. The cubic root of 237138949 is about 618.9671922084.

The spelling of 237138949 in words is "two hundred thirty-seven million, one hundred thirty-eight thousand, nine hundred forty-nine".