97430021 has 6 divisors (see below), whose sum is σ = 105501330. Its totient is φ = 89935248.

The previous prime is 97430017. The next prime is 97430029. The reversal of 97430021 is 12003479.

It can be written as a sum of positive squares in 3 ways, for example, as 624100 + 96805921 = 790^2 + 9839^2 .

It is not a de Polignac number, because 97430021 - 2² = 97430017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97430029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 288086 + ... + 288423.

It is an arithmetic number, because the mean of its divisors is an integer number (17583555).

Almost surely, 2^97430021 is an apocalyptic number.

It is an amenable number.

97430021 is a deficient number, since it is larger than the sum of its proper divisors (8071309).

97430021 is a wasteful number, since it uses less digits than its factorization.

97430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576535 (or 576522 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 97430021 is about 9870.6646686026. The cubic root of 97430021 is about 460.1480635527.

The spelling of 97430021 in words is "ninety-seven million, four hundred thirty thousand, twenty-one".