82722407 has 4 divisors (see below), whose sum is σ = 82742400. Its totient is φ = 82702416.

The previous prime is 82722383. The next prime is 82722433. The reversal of 82722407 is 70422728.

It is a happy number.

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 82722407 - 2⁸ = 82722151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82722487) 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, 1223 + ... + 12920.

It is an arithmetic number, because the mean of its divisors is an integer number (20685600).

Almost surely, 2^82722407 is an apocalyptic number.

82722407 is a deficient number, since it is larger than the sum of its proper divisors (19993).

82722407 is a wasteful number, since it uses less digits than its factorization.

82722407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19992.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 82722407 is about 9095.1859244328. The cubic root of 82722407 is about 435.7202266937.

The spelling of 82722407 in words is "eighty-two million, seven hundred twenty-two thousand, four hundred seven".