37418621 has 2 divisors, whose sum is σ = 37418622. Its totient is φ = 37418620.

The previous prime is 37418617. The next prime is 37418639. The reversal of 37418621 is 12681473.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19483396 + 17935225 = 4414^2 + 4235^2 .

It is a cyclic number.

It is not a de Polignac number, because 37418621 - 2² = 37418617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (37418021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18709310 + 18709311.

It is an arithmetic number, because the mean of its divisors is an integer number (18709311).

Almost surely, 2^37418621 is an apocalyptic number.

It is an amenable number.

37418621 is a deficient number, since it is larger than the sum of its proper divisors (1).

37418621 is an equidigital number, since it uses as much as digits as its factorization.

37418621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 37418621 is about 6117.0761806602. The cubic root of 37418621 is about 334.4741762004.

The spelling of 37418621 in words is "thirty-seven million, four hundred eighteen thousand, six hundred twenty-one".