82858409 has 4 divisors (see below), whose sum is σ = 83036304. Its totient is φ = 82680516.

The previous prime is 82858403. The next prime is 82858427. The reversal of 82858409 is 90485828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82858409 is a prime.

It is a super-2 number, since 2×82858409² = 13731031884022562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 82858409.

It is not an unprimeable number, because it can be changed into a prime (82858403) 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, 88247 + ... + 89180.

It is an arithmetic number, because the mean of its divisors is an integer number (20759076).

Almost surely, 2^82858409 is an apocalyptic number.

It is an amenable number.

82858409 is a deficient number, since it is larger than the sum of its proper divisors (177895).

82858409 is a wasteful number, since it uses less digits than its factorization.

82858409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177894.

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 82858409 is about 9102.6594465574. The cubic root of 82858409 is about 435.9588818082.

The spelling of 82858409 in words is "eighty-two million, eight hundred fifty-eight thousand, four hundred nine".