37628321 has 2 divisors, whose sum is σ = 37628322. Its totient is φ = 37628320.

The previous prime is 37628267. The next prime is 37628323. The reversal of 37628321 is 12382673.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34093921 + 3534400 = 5839^2 + 1880^2 .

It is an emirp because it is prime and its reverse (12382673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37628321 - 2²² = 33434017 is a prime.

Together with 37628323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37628323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18814160 + 18814161.

It is an arithmetic number, because the mean of its divisors is an integer number (18814161).

Almost surely, 2^37628321 is an apocalyptic number.

It is an amenable number.

37628321 is a deficient number, since it is larger than the sum of its proper divisors (1).

37628321 is an equidigital number, since it uses as much as digits as its factorization.

37628321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 37628321 is about 6134.1927749297. The cubic root of 37628321 is about 335.0978284126.

The spelling of 37628321 in words is "thirty-seven million, six hundred twenty-eight thousand, three hundred twenty-one".