97521417 has 30 divisors (see below), whose sum is σ = 164368282. Its totient is φ = 55714176.

The previous prime is 97521409. The next prime is 97521421. The reversal of 97521417 is 71412579.

It is a happy number.

97521417 is a `hidden beast` number, since 97 + 521 + 41 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49787136 + 47734281 = 7056^2 + 6909^2 .

It is not a de Polignac number, because 97521417 - 2³ = 97521409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97521407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 19353 + ... + 23865.

Almost surely, 2^97521417 is an apocalyptic number.

It is an amenable number.

97521417 is a deficient number, since it is larger than the sum of its proper divisors (66846865).

97521417 is an equidigital number, since it uses as much as digits as its factorization.

97521417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4547 (or 4523 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 97521417 is about 9875.2932614682. The cubic root of 97521417 is about 460.2919020003.

The spelling of 97521417 in words is "ninety-seven million, five hundred twenty-one thousand, four hundred seventeen".