97694921 has 2 divisors, whose sum is σ = 97694922. Its totient is φ = 97694920.

The previous prime is 97694917. The next prime is 97694963. The reversal of 97694921 is 12949679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55950400 + 41744521 = 7480^2 + 6461^2 .

It is an emirp because it is prime and its reverse (12949679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97694921 - 2² = 97694917 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97694521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48847460 + 48847461.

It is an arithmetic number, because the mean of its divisors is an integer number (48847461).

Almost surely, 2^97694921 is an apocalyptic number.

It is an amenable number.

97694921 is a deficient number, since it is larger than the sum of its proper divisors (1).

97694921 is an equidigital number, since it uses as much as digits as its factorization.

97694921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 97694921 is about 9884.0741093944. The cubic root of 97694921 is about 460.5647144527.

The spelling of 97694921 in words is "ninety-seven million, six hundred ninety-four thousand, nine hundred twenty-one".