999987103 has 2 divisors, whose sum is σ = 999987104. Its totient is φ = 999987102.

The previous prime is 999987101. The next prime is 999987137. The reversal of 999987103 is 301789999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999987103 - 2¹ = 999987101 is a prime.

Together with 999987101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999987101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499993551 + 499993552.

It is an arithmetic number, because the mean of its divisors is an integer number (499993552).

Almost surely, 2^999987103 is an apocalyptic number.

999987103 is a deficient number, since it is larger than the sum of its proper divisors (1).

999987103 is an equidigital number, since it uses as much as digits as its factorization.

999987103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 999987103 is about 31622.5726815514. The cubic root of 999987103 is about 999.9957009815.

The spelling of 999987103 in words is "nine hundred ninety-nine million, nine hundred eighty-seven thousand, one hundred three".