828372109 has 2 divisors, whose sum is σ = 828372110. Its totient is φ = 828372108.

The previous prime is 828372067. The next prime is 828372119. The reversal of 828372109 is 901273828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 798232009 + 30140100 = 28253^2 + 5490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-828372109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (828372119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 414186054 + 414186055.

It is an arithmetic number, because the mean of its divisors is an integer number (414186055).

Almost surely, 2^828372109 is an apocalyptic number.

It is an amenable number.

828372109 is a deficient number, since it is larger than the sum of its proper divisors (1).

828372109 is an equidigital number, since it uses as much as digits as its factorization.

828372109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 828372109 is about 28781.4542544327. The cubic root of 828372109 is about 939.1648342490.

The spelling of 828372109 in words is "eight hundred twenty-eight million, three hundred seventy-two thousand, one hundred nine".