999987299 has 2 divisors, whose sum is σ = 999987300. Its totient is φ = 999987298.

The previous prime is 999987281. The next prime is 999987301. The reversal of 999987299 is 992789999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999987299 - 2¹² = 999983203 is a prime.

It is a super-2 number, since 2×999987299² = 1999949196322630802, which contains 22 as substring.

Together with 999987301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999981299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499993649 + 499993650.

It is an arithmetic number, because the mean of its divisors is an integer number (499993650).

Almost surely, 2^999987299 is an apocalyptic number.

999987299 is a deficient number, since it is larger than the sum of its proper divisors (1).

999987299 is an equidigital number, since it uses as much as digits as its factorization.

999987299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59521392, while the sum is 71.

The square root of 999987299 is about 31622.5757806033. The cubic root of 999987299 is about 999.9957663154.

The spelling of 999987299 in words is "nine hundred ninety-nine million, nine hundred eighty-seven thousand, two hundred ninety-nine".