97917829 has 2 divisors, whose sum is σ = 97917830. Its totient is φ = 97917828.

The previous prime is 97917823. The next prime is 97917847. The reversal of 97917829 is 92871979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86527204 + 11390625 = 9302^2 + 3375^2 .

It is an emirp because it is prime and its reverse (92871979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97917829 - 2³ = 97917821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97917821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48958914 + 48958915.

It is an arithmetic number, because the mean of its divisors is an integer number (48958915).

Almost surely, 2^97917829 is an apocalyptic number.

It is an amenable number.

97917829 is a deficient number, since it is larger than the sum of its proper divisors (1).

97917829 is an equidigital number, since it uses as much as digits as its factorization.

97917829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 52.

The square root of 97917829 is about 9895.3438040323. The cubic root of 97917829 is about 460.9147346160.

The spelling of 97917829 in words is "ninety-seven million, nine hundred seventeen thousand, eight hundred twenty-nine".