37640689 has 2 divisors, whose sum is σ = 37640690. Its totient is φ = 37640688.

The previous prime is 37640683. The next prime is 37640693. The reversal of 37640689 is 98604673.

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., 37271025 + 369664 = 6105^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 37640689 - 2⁹ = 37640177 is a prime.

It is not a weakly prime, because it can be changed into another prime (37640683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18820344 + 18820345.

It is an arithmetic number, because the mean of its divisors is an integer number (18820345).

Almost surely, 2^37640689 is an apocalyptic number.

It is an amenable number.

37640689 is a deficient number, since it is larger than the sum of its proper divisors (1).

37640689 is an equidigital number, since it uses as much as digits as its factorization.

37640689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 37640689 is about 6135.2008117094. The cubic root of 37640689 is about 335.1345386691.

The spelling of 37640689 in words is "thirty-seven million, six hundred forty thousand, six hundred eighty-nine".