37661369 has 2 divisors, whose sum is σ = 37661370. Its totient is φ = 37661368.

The previous prime is 37661297. The next prime is 37661383. The reversal of 37661369 is 96316673.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35940025 + 1721344 = 5995^2 + 1312^2 .

It is a cyclic number.

It is not a de Polignac number, because 37661369 - 2¹² = 37657273 is a prime.

It is a super-2 number, since 2×37661369² = 2836757429908322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (37661269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18830684 + 18830685.

It is an arithmetic number, because the mean of its divisors is an integer number (18830685).

Almost surely, 2^37661369 is an apocalyptic number.

It is an amenable number.

37661369 is a deficient number, since it is larger than the sum of its proper divisors (1).

37661369 is an equidigital number, since it uses as much as digits as its factorization.

37661369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 41.

The square root of 37661369 is about 6136.8859366946. The cubic root of 37661369 is about 335.1959023476.

The spelling of 37661369 in words is "thirty-seven million, six hundred sixty-one thousand, three hundred sixty-nine".