820159429 has 8 divisors (see below), whose sum is σ = 827101440. Its totient is φ = 813228000.

The previous prime is 820159421. The next prime is 820159463. The reversal of 820159429 is 924951028.

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 820159429 - 2³ = 820159421 is a prime.

It is a super-2 number, since 2×820159429² = 1345322977955212082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 820159391 and 820159400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820159421) 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, 253977 + ... + 257185.

It is an arithmetic number, because the mean of its divisors is an integer number (103387680).

Almost surely, 2^820159429 is an apocalyptic number.

It is an amenable number.

820159429 is a deficient number, since it is larger than the sum of its proper divisors (6942011).

820159429 is a wasteful number, since it uses less digits than its factorization.

820159429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 820159429 is about 28638.4257423483. The cubic root of 820159429 is about 936.0508185359.

The spelling of 820159429 in words is "eight hundred twenty million, one hundred fifty-nine thousand, four hundred twenty-nine".