820422659 has 4 divisors (see below), whose sum is σ = 937625904. Its totient is φ = 703219416.

The previous prime is 820422623. The next prime is 820422683. The reversal of 820422659 is 956224028.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 820422659 - 2²⁴ = 803645443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820422689) 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, 58601612 + ... + 58601625.

It is an arithmetic number, because the mean of its divisors is an integer number (234406476).

Almost surely, 2^820422659 is an apocalyptic number.

820422659 is a deficient number, since it is larger than the sum of its proper divisors (117203245).

820422659 is a wasteful number, since it uses less digits than its factorization.

820422659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117203244.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 820422659 is about 28643.0211220814. The cubic root of 820422659 is about 936.1509495969.

The spelling of 820422659 in words is "eight hundred twenty million, four hundred twenty-two thousand, six hundred fifty-nine".