82750791 has 8 divisors (see below), whose sum is σ = 112900480. Its totient is φ = 53884152.

The previous prime is 82750777. The next prime is 82750799. The reversal of 82750791 is 19705728.

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

It is not a de Polignac number, because 82750791 - 2¹⁵ = 82718023 is a prime.

It is a super-2 number, since 2×82750791² = 13695386822251362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82750799) 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, 320611 + ... + 320868.

It is an arithmetic number, because the mean of its divisors is an integer number (14112560).

Almost surely, 2^82750791 is an apocalyptic number.

82750791 is a deficient number, since it is larger than the sum of its proper divisors (30149689).

82750791 is a wasteful number, since it uses less digits than its factorization.

82750791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641525.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 82750791 is about 9096.7461765183. The cubic root of 82750791 is about 435.7700562747.

The spelling of 82750791 in words is "eighty-two million, seven hundred fifty thousand, seven hundred ninety-one".