82688421 has 8 divisors (see below), whose sum is σ = 110489184. Its totient is φ = 55006640.

The previous prime is 82688413. The next prime is 82688429. The reversal of 82688421 is 12488628.

It is an interprime number because it is at equal distance from previous prime (82688413) and next prime (82688429).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82688421 - 2³ = 82688413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82688421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82688429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28110 + ... + 30911.

It is an arithmetic number, because the mean of its divisors is an integer number (13811148).

Almost surely, 2^82688421 is an apocalyptic number.

It is an amenable number.

82688421 is a deficient number, since it is larger than the sum of its proper divisors (27800763).

82688421 is a wasteful number, since it uses less digits than its factorization.

82688421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59491.

The product of its digits is 49152, while the sum is 39.

The square root of 82688421 is about 9093.3173814621. The cubic root of 82688421 is about 435.6605475144.

The spelling of 82688421 in words is "eighty-two million, six hundred eighty-eight thousand, four hundred twenty-one".