82499999 has 4 divisors (see below), whose sum is σ = 83852520. Its totient is φ = 81147480.

The previous prime is 82499987. The next prime is 82500017. The reversal of 82499999 is 99999428.

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-82499999 is a prime.

It is a Duffinian number.

82499999 is a modest number, since divided by 9999 gives 8249 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82499909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676169 + ... + 676290.

It is an arithmetic number, because the mean of its divisors is an integer number (20963130).

Almost surely, 2^82499999 is an apocalyptic number.

82499999 is a deficient number, since it is larger than the sum of its proper divisors (1352521).

82499999 is a wasteful number, since it uses less digits than its factorization.

82499999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352520.

The product of its digits is 3779136, while the sum is 59.

The square root of 82499999 is about 9082.9510072443. The cubic root of 82499999 is about 435.3293827998.

The spelling of 82499999 in words is "eighty-two million, four hundred ninety-nine thousand, nine hundred ninety-nine".