97867621 has 2 divisors, whose sum is σ = 97867622. Its totient is φ = 97867620.

The previous prime is 97867579. The next prime is 97867639. The reversal of 97867621 is 12676879.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83722500 + 14145121 = 9150^2 + 3761^2 .

It is an emirp because it is prime and its reverse (12676879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97867621 - 2⁷ = 97867493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97867681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48933810 + 48933811.

It is an arithmetic number, because the mean of its divisors is an integer number (48933811).

Almost surely, 2^97867621 is an apocalyptic number.

It is an amenable number.

97867621 is a deficient number, since it is larger than the sum of its proper divisors (1).

97867621 is an equidigital number, since it uses as much as digits as its factorization.

97867621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 46.

The square root of 97867621 is about 9892.8065279778. The cubic root of 97867621 is about 460.8359421438.

The spelling of 97867621 in words is "ninety-seven million, eight hundred sixty-seven thousand, six hundred twenty-one".