816769087 has 2 divisors, whose sum is σ = 816769088. Its totient is φ = 816769086.

The previous prime is 816769073. The next prime is 816769103. The reversal of 816769087 is 780967618.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 816769087 - 2⁷ = 816768959 is a prime.

It is a super-2 number, since 2×816769087² = 1334223482957627138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816769007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408384543 + 408384544.

It is an arithmetic number, because the mean of its divisors is an integer number (408384544).

Almost surely, 2^816769087 is an apocalyptic number.

816769087 is a deficient number, since it is larger than the sum of its proper divisors (1).

816769087 is an equidigital number, since it uses as much as digits as its factorization.

816769087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 816769087 is about 28579.1722588321. The cubic root of 816769087 is about 934.7592341457.

The spelling of 816769087 in words is "eight hundred sixteen million, seven hundred sixty-nine thousand, eighty-seven".