82899815 has 4 divisors (see below), whose sum is σ = 99479784. Its totient is φ = 66319848.

The previous prime is 82899799. The next prime is 82899821. The reversal of 82899815 is 51899828.

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

It is a cyclic number.

It is not a de Polignac number, because 82899815 - 2⁴ = 82899799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8289977 + ... + 8289986.

It is an arithmetic number, because the mean of its divisors is an integer number (24869946).

Almost surely, 2^82899815 is an apocalyptic number.

82899815 is a deficient number, since it is larger than the sum of its proper divisors (16579969).

82899815 is a wasteful number, since it uses less digits than its factorization.

82899815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16579968.

The product of its digits is 414720, while the sum is 50.

The square root of 82899815 is about 9104.9335527504. The cubic root of 82899815 is about 436.0314888320.

The spelling of 82899815 in words is "eighty-two million, eight hundred ninety-nine thousand, eight hundred fifteen".