82923781 has 4 divisors (see below), whose sum is σ = 83289312. Its totient is φ = 82558252.

The previous prime is 82923779. The next prime is 82923787. The reversal of 82923781 is 18732928.

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 not a de Polignac number, because 82923781 - 2¹ = 82923779 is a prime.

It is a super-2 number, since 2×82923781² = 13752706910671922, 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 (82923787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182425 + ... + 182878.

It is an arithmetic number, because the mean of its divisors is an integer number (20822328).

Almost surely, 2^82923781 is an apocalyptic number.

It is an amenable number.

82923781 is a deficient number, since it is larger than the sum of its proper divisors (365531).

82923781 is a wasteful number, since it uses less digits than its factorization.

82923781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365530.

The product of its digits is 48384, while the sum is 40.

The square root of 82923781 is about 9106.2495573095. The cubic root of 82923781 is about 436.0735030947.

The spelling of 82923781 in words is "eighty-two million, nine hundred twenty-three thousand, seven hundred eighty-one".