83812397 has 8 divisors (see below), whose sum is σ = 89134200. Its totient is φ = 78534144.

The previous prime is 83812387. The next prime is 83812403. The reversal of 83812397 is 79321838.

It can be written as a sum of positive squares in 4 ways, for example, as 28026436 + 55785961 = 5294^2 + 7469^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83812397 - 2¹² = 83808301 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 (83812307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6872 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (11141775).

Almost surely, 2^83812397 is an apocalyptic number.

It is an amenable number.

83812397 is a deficient number, since it is larger than the sum of its proper divisors (5321803).

83812397 is a wasteful number, since it uses less digits than its factorization.

83812397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21775.

The product of its digits is 72576, while the sum is 41.

The square root of 83812397 is about 9154.9110864060. The cubic root of 83812397 is about 437.6256348845.

The spelling of 83812397 in words is "eighty-three million, eight hundred twelve thousand, three hundred ninety-seven".