821482069 has 4 divisors (see below), whose sum is σ = 821785600. Its totient is φ = 821178540.

The previous prime is 821482037. The next prime is 821482073. The reversal of 821482069 is 960284128.

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 821482069 - 2⁵ = 821482037 is a prime.

It is a super-2 number, since 2×821482069² = 1349665579377041522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821482009) 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, 147669 + ... + 153130.

It is an arithmetic number, because the mean of its divisors is an integer number (205446400).

Almost surely, 2^821482069 is an apocalyptic number.

It is an amenable number.

821482069 is a deficient number, since it is larger than the sum of its proper divisors (303531).

821482069 is a wasteful number, since it uses less digits than its factorization.

821482069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303530.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 821482069 is about 28661.5084913547. The cubic root of 821482069 is about 936.5537261753.

The spelling of 821482069 in words is "eight hundred twenty-one million, four hundred eighty-two thousand, sixty-nine".