82249791 has 32 divisors (see below), whose sum is σ = 126137088. Its totient is φ = 47224320.

The previous prime is 82249787. The next prime is 82249793. The reversal of 82249791 is 19794228.

It is not a de Polignac number, because 82249791 - 2² = 82249787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82249793) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86380 + ... + 87326.

It is an arithmetic number, because the mean of its divisors is an integer number (3941784).

Almost surely, 2^82249791 is an apocalyptic number.

82249791 is a deficient number, since it is larger than the sum of its proper divisors (43887297).

82249791 is a wasteful number, since it uses less digits than its factorization.

82249791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its digits is 72576, while the sum is 42.

The square root of 82249791 is about 9069.1670510582. The cubic root of 82249791 is about 434.8888446337. Note that the first 4 decimals are identical.

The spelling of 82249791 in words is "eighty-two million, two hundred forty-nine thousand, seven hundred ninety-one".