82307861 has 4 divisors (see below), whose sum is σ = 82354272. Its totient is φ = 82261452.

The previous prime is 82307843. The next prime is 82307873. The reversal of 82307861 is 16870328.

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-82307861 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 (82307801) 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, 20435 + ... + 24128.

It is an arithmetic number, because the mean of its divisors is an integer number (20588568).

Almost surely, 2^82307861 is an apocalyptic number.

It is an amenable number.

82307861 is a deficient number, since it is larger than the sum of its proper divisors (46411).

82307861 is a wasteful number, since it uses less digits than its factorization.

82307861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46410.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 82307861 is about 9072.3679929774. The cubic root of 82307861 is about 434.9911673020.

The spelling of 82307861 in words is "eighty-two million, three hundred seven thousand, eight hundred sixty-one".