82793421 has 10 divisors (see below), whose sum is σ = 123679182. Its totient is φ = 55195560.

The previous prime is 82793419. The next prime is 82793429. The reversal of 82793421 is 12439728.

It can be written as a sum of positive squares in only one way, i.e., 54597321 + 28196100 = 7389^2 + 5310^2 .

It is not a de Polignac number, because 82793421 - 2¹ = 82793419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82793429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 510990 + ... + 511151.

Almost surely, 2^82793421 is an apocalyptic number.

82793421 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

82793421 is a deficient number, since it is larger than the sum of its proper divisors (40885761).

82793421 is a wasteful number, since it uses less digits than its factorization.

82793421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022153 (or 1022144 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 82793421 is about 9099.0890203360. The cubic root of 82793421 is about 435.8448740425.

The spelling of 82793421 in words is "eighty-two million, seven hundred ninety-three thousand, four hundred twenty-one".