37868213 has 2 divisors, whose sum is σ = 37868214. Its totient is φ = 37868212.

The previous prime is 37868209. The next prime is 37868219. The reversal of 37868213 is 31286873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23107249 + 14760964 = 4807^2 + 3842^2 .

It is a cyclic number.

It is not a de Polignac number, because 37868213 - 2² = 37868209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37868219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18934106 + 18934107.

It is an arithmetic number, because the mean of its divisors is an integer number (18934107).

Almost surely, 2^37868213 is an apocalyptic number.

It is an amenable number.

37868213 is a deficient number, since it is larger than the sum of its proper divisors (1).

37868213 is an equidigital number, since it uses as much as digits as its factorization.

37868213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 37868213 is about 6153.7153817836. The cubic root of 37868213 is about 335.8084373146.

The spelling of 37868213 in words is "thirty-seven million, eight hundred sixty-eight thousand, two hundred thirteen".