97213637 has 2 divisors, whose sum is σ = 97213638. Its totient is φ = 97213636.

The previous prime is 97213631. The next prime is 97213639. The reversal of 97213637 is 73631279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52041796 + 45171841 = 7214^2 + 6721^2 .

It is an emirp because it is prime and its reverse (73631279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97213637 - 2⁴ = 97213621 is a prime.

Together with 97213639, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97213637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97213631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48606818 + 48606819.

It is an arithmetic number, because the mean of its divisors is an integer number (48606819).

Almost surely, 2^97213637 is an apocalyptic number.

It is an amenable number.

97213637 is a deficient number, since it is larger than the sum of its proper divisors (1).

97213637 is an equidigital number, since it uses as much as digits as its factorization.

97213637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 38.

The square root of 97213637 is about 9859.6976119960. The cubic root of 97213637 is about 459.8071608210.

The spelling of 97213637 in words is "ninety-seven million, two hundred thirteen thousand, six hundred thirty-seven".