97830239 has 4 divisors (see below), whose sum is σ = 105355656. Its totient is φ = 90304824.

The previous prime is 97830197. The next prime is 97830269. The reversal of 97830239 is 93203879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97830239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97830196 and 97830205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97830269) 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, 3762689 + ... + 3762714.

It is an arithmetic number, because the mean of its divisors is an integer number (26338914).

Almost surely, 2^97830239 is an apocalyptic number.

97830239 is a deficient number, since it is larger than the sum of its proper divisors (7525417).

97830239 is a wasteful number, since it uses less digits than its factorization.

97830239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7525416.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 97830239 is about 9890.9169948999. The cubic root of 97830239 is about 460.7772602806. Note that the first 3 decimals are identical.

The spelling of 97830239 in words is "ninety-seven million, eight hundred thirty thousand, two hundred thirty-nine".