97213643 has 2 divisors, whose sum is σ = 97213644. Its totient is φ = 97213642.

The previous prime is 97213639. The next prime is 97213679. The reversal of 97213643 is 34631279.

It is a weak prime.

It is an emirp because it is prime and its reverse (34631279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97213643 - 2² = 97213639 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97213603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48606821 + 48606822.

It is an arithmetic number, because the mean of its divisors is an integer number (48606822).

Almost surely, 2^97213643 is an apocalyptic number.

97213643 is a deficient number, since it is larger than the sum of its proper divisors (1).

97213643 is an equidigital number, since it uses as much as digits as its factorization.

97213643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 97213643 is about 9859.6979162650. The cubic root of 97213643 is about 459.8071702807.

The spelling of 97213643 in words is "ninety-seven million, two hundred thirteen thousand, six hundred forty-three".