37621369 has 2 divisors, whose sum is σ = 37621370. Its totient is φ = 37621368.

The previous prime is 37621351. The next prime is 37621379. The reversal of 37621369 is 96312673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25371369 + 12250000 = 5037^2 + 3500^2 .

It is an emirp because it is prime and its reverse (96312673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 37621369 - 2⁹ = 37620857 is a prime.

It is a super-2 number, since 2×37621369² = 2830734810868322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (37621319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18810684 + 18810685.

It is an arithmetic number, because the mean of its divisors is an integer number (18810685).

Almost surely, 2^37621369 is an apocalyptic number.

It is an amenable number.

37621369 is a deficient number, since it is larger than the sum of its proper divisors (1).

37621369 is an equidigital number, since it uses as much as digits as its factorization.

37621369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 37.

The square root of 37621369 is about 6133.6260890276. The cubic root of 37621369 is about 335.0771902025.

The spelling of 37621369 in words is "thirty-seven million, six hundred twenty-one thousand, three hundred sixty-nine".