82640943 has 72 divisors (see below), whose sum is σ = 154531104. Its totient is φ = 41627520.

The previous prime is 82640897. The next prime is 82640977. The reversal of 82640943 is 34904628.

It is a happy number.

82640943 is a `hidden beast` number, since 8 + 2 + 640 + 9 + 4 + 3 = 666.

It is not a de Polignac number, because 82640943 - 2⁸ = 82640687 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 82640898 and 82640907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82640843) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 281905 + ... + 282197.

Almost surely, 2^82640943 is an apocalyptic number.

82640943 is a deficient number, since it is larger than the sum of its proper divisors (71890161).

82640943 is a wasteful number, since it uses less digits than its factorization.

82640943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 82640943 is about 9090.7064081951. The cubic root of 82640943 is about 435.5771490921.

The spelling of 82640943 in words is "eighty-two million, six hundred forty thousand, nine hundred forty-three".