826397881 has 4 divisors (see below), whose sum is σ = 826501264. Its totient is φ = 826294500.

The previous prime is 826397879. The next prime is 826397893. The reversal of 826397881 is 188793628.

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 826397881 - 2¹ = 826397879 is a prime.

It is a super-2 number, since 2×826397881² = 1365866915442580322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (826397821) 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, 38595 + ... + 56056.

It is an arithmetic number, because the mean of its divisors is an integer number (206625316).

Almost surely, 2^826397881 is an apocalyptic number.

It is an amenable number.

826397881 is a deficient number, since it is larger than the sum of its proper divisors (103383).

826397881 is an equidigital number, since it uses as much as digits as its factorization.

826397881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103382.

The product of its digits is 1161216, while the sum is 52.

The square root of 826397881 is about 28747.1369183089. The cubic root of 826397881 is about 938.4181487111.

The spelling of 826397881 in words is "eight hundred twenty-six million, three hundred ninety-seven thousand, eight hundred eighty-one".