82506407 has 4 divisors (see below), whose sum is σ = 85167936. Its totient is φ = 79844880.

The previous prime is 82506401. The next prime is 82506409. The reversal of 82506407 is 70460528.

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 82506407 - 2¹⁰ = 82505383 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 (82506401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330718 + ... + 1330779.

It is an arithmetic number, because the mean of its divisors is an integer number (21291984).

Almost surely, 2^82506407 is an apocalyptic number.

82506407 is a deficient number, since it is larger than the sum of its proper divisors (2661529).

82506407 is a wasteful number, since it uses less digits than its factorization.

82506407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2661528.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 82506407 is about 9083.3037491873. The cubic root of 82506407 is about 435.3406535816.

The spelling of 82506407 in words is "eighty-two million, five hundred six thousand, four hundred seven".