82239993 has 48 divisors (see below), whose sum is σ = 135462912. Its totient is φ = 47628000.

The previous prime is 82239991. The next prime is 82240001. The reversal of 82239993 is 39993228.

It is not a de Polignac number, because 82239993 - 2¹ = 82239991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82239991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 389658 + ... + 389868.

It is an arithmetic number, because the mean of its divisors is an integer number (2822144).

Almost surely, 2^82239993 is an apocalyptic number.

It is an amenable number.

82239993 is a deficient number, since it is larger than the sum of its proper divisors (53222919).

82239993 is a wasteful number, since it uses less digits than its factorization.

82239993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 383 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 82239993 is about 9068.6268530577. The cubic root of 82239993 is about 434.8715752479.

The spelling of 82239993 in words is "eighty-two million, two hundred thirty-nine thousand, nine hundred ninety-three".