82650813 has 8 divisors (see below), whose sum is σ = 125944128. Its totient is φ = 47229024.

The previous prime is 82650809. The next prime is 82650833. The reversal of 82650813 is 31805628.

It is a happy number.

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

It is not a de Polignac number, because 82650813 - 2² = 82650809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82650803) 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, 1967856 + ... + 1967897.

It is an arithmetic number, because the mean of its divisors is an integer number (15743016).

Almost surely, 2^82650813 is an apocalyptic number.

It is an amenable number.

82650813 is a deficient number, since it is larger than the sum of its proper divisors (43293315).

82650813 is a wasteful number, since it uses less digits than its factorization.

82650813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935763.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 82650813 is about 9091.2492540904. The cubic root of 82650813 is about 435.5944890657.

The spelling of 82650813 in words is "eighty-two million, six hundred fifty thousand, eight hundred thirteen".