97909073 has 4 divisors (see below), whose sum is σ = 99756468. Its totient is φ = 96061680.

The previous prime is 97909061. The next prime is 97909079. The reversal of 97909073 is 37090979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37090979 = 3547 ⋅10457.

It can be written as a sum of positive squares in 2 ways, for example, as 46471489 + 51437584 = 6817^2 + 7172^2 .

It is a cyclic number.

It is not a de Polignac number, because 97909073 - 2⁴ = 97909057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97909079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923618 + ... + 923723.

It is an arithmetic number, because the mean of its divisors is an integer number (24939117).

Almost surely, 2^97909073 is an apocalyptic number.

It is an amenable number.

97909073 is a deficient number, since it is larger than the sum of its proper divisors (1847395).

97909073 is a wasteful number, since it uses less digits than its factorization.

97909073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847394.

The product of its (nonzero) digits is 107163, while the sum is 44.

The square root of 97909073 is about 9894.9013638338. The cubic root of 97909073 is about 460.9009955800.

The spelling of 97909073 in words is "ninety-seven million, nine hundred nine thousand, seventy-three".