97664533 has 2 divisors, whose sum is σ = 97664534. Its totient is φ = 97664532.

The previous prime is 97664521. The next prime is 97664537. The reversal of 97664533 is 33546679.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97653924 + 10609 = 9882^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 97664533 - 2¹³ = 97656341 is a prime.

It is a super-2 number, since 2×97664533² = 19076722012216178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97664533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97664537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48832266 + 48832267.

It is an arithmetic number, because the mean of its divisors is an integer number (48832267).

Almost surely, 2^97664533 is an apocalyptic number.

It is an amenable number.

97664533 is a deficient number, since it is larger than the sum of its proper divisors (1).

97664533 is an equidigital number, since it uses as much as digits as its factorization.

97664533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 43.

The square root of 97664533 is about 9882.5367694737. The cubic root of 97664533 is about 460.5169566240.

The spelling of 97664533 in words is "ninety-seven million, six hundred sixty-four thousand, five hundred thirty-three".