37618121 has 2 divisors, whose sum is σ = 37618122. Its totient is φ = 37618120.

The previous prime is 37618099. The next prime is 37618193. The reversal of 37618121 is 12181673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 17547721 = 4480^2 + 4189^2 .

It is a cyclic number.

It is not a de Polignac number, because 37618121 - 2⁶ = 37618057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37618621) 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, 18809060 + 18809061.

It is an arithmetic number, because the mean of its divisors is an integer number (18809061).

Almost surely, 2^37618121 is an apocalyptic number.

It is an amenable number.

37618121 is a deficient number, since it is larger than the sum of its proper divisors (1).

37618121 is an equidigital number, since it uses as much as digits as its factorization.

37618121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 37618121 is about 6133.3613133420. The cubic root of 37618121 is about 335.0675470833.

Adding to 37618121 its reverse (12181673), we get a palindrome (49799794).

The spelling of 37618121 in words is "thirty-seven million, six hundred eighteen thousand, one hundred twenty-one".