82651783 has 4 divisors (see below), whose sum is σ = 82867968. Its totient is φ = 82435600.

The previous prime is 82651781. The next prime is 82651787. The reversal of 82651783 is 38715628.

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 82651783 - 2¹ = 82651781 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 (82651781) 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, 107518 + ... + 108283.

It is an arithmetic number, because the mean of its divisors is an integer number (20716992).

Almost surely, 2^82651783 is an apocalyptic number.

82651783 is a deficient number, since it is larger than the sum of its proper divisors (216185).

82651783 is a wasteful number, since it uses less digits than its factorization.

82651783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216184.

The product of its digits is 80640, while the sum is 40.

The square root of 82651783 is about 9091.3026019377. The cubic root of 82651783 is about 435.5961931224.

The spelling of 82651783 in words is "eighty-two million, six hundred fifty-one thousand, seven hundred eighty-three".