820755041 has 4 divisors (see below), whose sum is σ = 825790512. Its totient is φ = 815719572.

The previous prime is 820755029. The next prime is 820755043. The reversal of 820755041 is 140557028.

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 a de Polignac number, because none of the positive numbers 2^k-820755041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 820754989 and 820755007.

It is not an unprimeable number, because it can be changed into a prime (820755043) 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, 2517491 + ... + 2517816.

It is an arithmetic number, because the mean of its divisors is an integer number (206447628).

Almost surely, 2^820755041 is an apocalyptic number.

It is an amenable number.

820755041 is a deficient number, since it is larger than the sum of its proper divisors (5035471).

820755041 is a wasteful number, since it uses less digits than its factorization.

820755041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035470.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 820755041 is about 28648.8226808712. The cubic root of 820755041 is about 936.2773550581.

The spelling of 820755041 in words is "eight hundred twenty million, seven hundred fifty-five thousand, forty-one".