999973087 has 2 divisors, whose sum is σ = 999973088. Its totient is φ = 999973086.

The previous prime is 999973069. The next prime is 999973103. The reversal of 999973087 is 780379999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999973087 - 2¹¹ = 999971039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999373087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499986543 + 499986544.

It is an arithmetic number, because the mean of its divisors is an integer number (499986544).

Almost surely, 2^999973087 is an apocalyptic number.

999973087 is a deficient number, since it is larger than the sum of its proper divisors (1).

999973087 is an equidigital number, since it uses as much as digits as its factorization.

999973087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7715736, while the sum is 61.

The square root of 999973087 is about 31622.3510669273. The cubic root of 999973087 is about 999.9910289195.

The spelling of 999973087 in words is "nine hundred ninety-nine million, nine hundred seventy-three thousand, eighty-seven".