828249731 has 2 divisors, whose sum is σ = 828249732. Its totient is φ = 828249730.

The previous prime is 828249713. The next prime is 828249749. The reversal of 828249731 is 137942828.

Together with previous prime (828249713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (828249713) and next prime (828249749).

It is a cyclic number.

It is not a de Polignac number, because 828249731 - 2¹⁴ = 828233347 is a prime.

It is a super-2 number, since 2×828249731² = 1371995233803144722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (828249701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414124865 + 414124866.

It is an arithmetic number, because the mean of its divisors is an integer number (414124866).

Almost surely, 2^828249731 is an apocalyptic number.

828249731 is a deficient number, since it is larger than the sum of its proper divisors (1).

828249731 is an equidigital number, since it uses as much as digits as its factorization.

828249731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 828249731 is about 28779.3281888233. The cubic root of 828249731 is about 939.1185833862.

The spelling of 828249731 in words is "eight hundred twenty-eight million, two hundred forty-nine thousand, seven hundred thirty-one".