37645649 has 2 divisors, whose sum is σ = 37645650. Its totient is φ = 37645648.

The previous prime is 37645639. The next prime is 37645661. The reversal of 37645649 is 94654673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29235649 + 8410000 = 5407^2 + 2900^2 .

It is a cyclic number.

It is not a de Polignac number, because 37645649 - 2¹⁶ = 37580113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (37645639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18822824 + 18822825.

It is an arithmetic number, because the mean of its divisors is an integer number (18822825).

Almost surely, 2^37645649 is an apocalyptic number.

It is an amenable number.

37645649 is a deficient number, since it is larger than the sum of its proper divisors (1).

37645649 is an equidigital number, since it uses as much as digits as its factorization.

37645649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 44.

The square root of 37645649 is about 6135.6050231416. The cubic root of 37645649 is about 335.1492585050.

The spelling of 37645649 in words is "thirty-seven million, six hundred forty-five thousand, six hundred forty-nine".