37421213 has 2 divisors, whose sum is σ = 37421214. Its totient is φ = 37421212.

The previous prime is 37421191. The next prime is 37421227. The reversal of 37421213 is 31212473.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27321529 + 10099684 = 5227^2 + 3178^2 .

It is an emirp because it is prime and its reverse (31212473) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37421213 - 2⁶ = 37421149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37421113) 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, 18710606 + 18710607.

It is an arithmetic number, because the mean of its divisors is an integer number (18710607).

Almost surely, 2^37421213 is an apocalyptic number.

It is an amenable number.

37421213 is a deficient number, since it is larger than the sum of its proper divisors (1).

37421213 is an equidigital number, since it uses as much as digits as its factorization.

37421213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 23.

The square root of 37421213 is about 6117.2880429157. The cubic root of 37421213 is about 334.4818990669.

Adding to 37421213 its reverse (31212473), we get a palindrome (68633686).

The spelling of 37421213 in words is "thirty-seven million, four hundred twenty-one thousand, two hundred thirteen".