828019931 has 2 divisors, whose sum is σ = 828019932. Its totient is φ = 828019930.

The previous prime is 828019891. The next prime is 828019939. The reversal of 828019931 is 139910828.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828019931 is a prime.

It is a super-2 number, since 2×828019931² = 1371234012266489522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (828019939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414009965 + 414009966.

It is an arithmetic number, because the mean of its divisors is an integer number (414009966).

Almost surely, 2^828019931 is an apocalyptic number.

828019931 is a deficient number, since it is larger than the sum of its proper divisors (1).

828019931 is an equidigital number, since it uses as much as digits as its factorization.

828019931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 828019931 is about 28775.3354628578. The cubic root of 828019931 is about 939.0317217371.

The spelling of 828019931 in words is "eight hundred twenty-eight million, nineteen thousand, nine hundred thirty-one".