97644037 has 2 divisors, whose sum is σ = 97644038. Its totient is φ = 97644036.

The previous prime is 97644031. The next prime is 97644047. The reversal of 97644037 is 73044679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85211361 + 12432676 = 9231^2 + 3526^2 .

It is an emirp because it is prime and its reverse (73044679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97644037 - 2¹⁹ = 97119749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97644031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48822018 + 48822019.

It is an arithmetic number, because the mean of its divisors is an integer number (48822019).

Almost surely, 2^97644037 is an apocalyptic number.

It is an amenable number.

97644037 is a deficient number, since it is larger than the sum of its proper divisors (1).

97644037 is an equidigital number, since it uses as much as digits as its factorization.

97644037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 97644037 is about 9881.4997343521. The cubic root of 97644037 is about 460.4847394837.

The spelling of 97644037 in words is "ninety-seven million, six hundred forty-four thousand, thirty-seven".