37073221 has 2 divisors, whose sum is σ = 37073222. Its totient is φ = 37073220.

The previous prime is 37073219. The next prime is 37073249. The reversal of 37073221 is 12237073.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24900100 + 12173121 = 4990^2 + 3489^2 .

It is a cyclic number.

It is not a de Polignac number, because 37073221 - 2¹ = 37073219 is a prime.

Together with 37073219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37073321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18536610 + 18536611.

It is an arithmetic number, because the mean of its divisors is an integer number (18536611).

Almost surely, 2^37073221 is an apocalyptic number.

It is an amenable number.

37073221 is a deficient number, since it is larger than the sum of its proper divisors (1).

37073221 is an equidigital number, since it uses as much as digits as its factorization.

37073221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 37073221 is about 6088.7782846808. The cubic root of 37073221 is about 333.4418498909.

The spelling of 37073221 in words is "thirty-seven million, seventy-three thousand, two hundred twenty-one".