82435921 has 4 divisors (see below), whose sum is σ = 83833200. Its totient is φ = 81038644.

The previous prime is 82435909. The next prime is 82435939. The reversal of 82435921 is 12953428.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82435921 - 2¹¹ = 82433873 is a prime.

It is a super-2 number, since 2×82435921² = 13591362142236482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82435121) 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, 698551 + ... + 698668.

It is an arithmetic number, because the mean of its divisors is an integer number (20958300).

Almost surely, 2^82435921 is an apocalyptic number.

It is an amenable number.

82435921 is a deficient number, since it is larger than the sum of its proper divisors (1397279).

82435921 is a wasteful number, since it uses less digits than its factorization.

82435921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397278.

The product of its digits is 17280, while the sum is 34.

The square root of 82435921 is about 9079.4229442184. The cubic root of 82435921 is about 435.2166463889.

The spelling of 82435921 in words is "eighty-two million, four hundred thirty-five thousand, nine hundred twenty-one".