97238621 has 2 divisors, whose sum is σ = 97238622. Its totient is φ = 97238620.

The previous prime is 97238591. The next prime is 97238663. The reversal of 97238621 is 12683279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64176121 + 33062500 = 8011^2 + 5750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97238621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97238671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48619310 + 48619311.

It is an arithmetic number, because the mean of its divisors is an integer number (48619311).

Almost surely, 2^97238621 is an apocalyptic number.

It is an amenable number.

97238621 is a deficient number, since it is larger than the sum of its proper divisors (1).

97238621 is an equidigital number, since it uses as much as digits as its factorization.

97238621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 97238621 is about 9860.9645065785. The cubic root of 97238621 is about 459.8465477441.

It can be divided in two parts, 972 and 38621, that added together give a palindrome (39593).

The spelling of 97238621 in words is "ninety-seven million, two hundred thirty-eight thousand, six hundred twenty-one".