97699997 has 2 divisors, whose sum is σ = 97699998. Its totient is φ = 97699996.

The previous prime is 97699967. The next prime is 97700023. The reversal of 97699997 is 79999679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63664441 + 34035556 = 7979^2 + 5834^2 .

It is an emirp because it is prime and its reverse (79999679) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97699997 - 2⁶ = 97699933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97699907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48849998 + 48849999.

It is an arithmetic number, because the mean of its divisors is an integer number (48849999).

Almost surely, 2^97699997 is an apocalyptic number.

It is an amenable number.

97699997 is a deficient number, since it is larger than the sum of its proper divisors (1).

97699997 is an equidigital number, since it uses as much as digits as its factorization.

97699997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17360406, while the sum is 65.

The square root of 97699997 is about 9884.3308827659. The cubic root of 97699997 is about 460.5726909370.

It can be divided in two parts, 97699 and 997, that multiplied together give a triangular number (97405903 = T₁₃₉₅₇).

The spelling of 97699997 in words is "ninety-seven million, six hundred ninety-nine thousand, nine hundred ninety-seven".