97958309 has 4 divisors (see below), whose sum is σ = 98524716. Its totient is φ = 97391904.

The previous prime is 97958279. The next prime is 97958321. The reversal of 97958309 is 90385979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90385979 = 2411 ⋅37489.

It can be written as a sum of positive squares in 2 ways, for example, as 94517284 + 3441025 = 9722^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 97958309 - 2²⁰ = 96909733 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 (97958339) 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, 282944 + ... + 283289.

It is an arithmetic number, because the mean of its divisors is an integer number (24631179).

Almost surely, 2^97958309 is an apocalyptic number.

It is an amenable number.

97958309 is a deficient number, since it is larger than the sum of its proper divisors (566407).

97958309 is a wasteful number, since it uses less digits than its factorization.

97958309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566406.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 97958309 is about 9897.3889991250. The cubic root of 97958309 is about 460.9782411232.

The spelling of 97958309 in words is "ninety-seven million, nine hundred fifty-eight thousand, three hundred nine".