816432049 has 2 divisors, whose sum is σ = 816432050. Its totient is φ = 816432048.

The previous prime is 816432037. The next prime is 816432079. The reversal of 816432049 is 940234618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792028449 + 24403600 = 28143^2 + 4940^2 .

It is a cyclic number.

It is not a de Polignac number, because 816432049 - 2⁷ = 816431921 is a prime.

It is a super-2 number, since 2×816432049² = 1333122581268676802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 816431999 and 816432017.

It is not a weakly prime, because it can be changed into another prime (816432079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408216024 + 408216025.

It is an arithmetic number, because the mean of its divisors is an integer number (408216025).

Almost surely, 2^816432049 is an apocalyptic number.

It is an amenable number.

816432049 is a deficient number, since it is larger than the sum of its proper divisors (1).

816432049 is an equidigital number, since it uses as much as digits as its factorization.

816432049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 816432049 is about 28573.2750835462. The cubic root of 816432049 is about 934.6306409964.

The spelling of 816432049 in words is "eight hundred sixteen million, four hundred thirty-two thousand, forty-nine".