999987427 has 2 divisors, whose sum is σ = 999987428. Its totient is φ = 999987426.

The previous prime is 999987421. The next prime is 999987433. The reversal of 999987427 is 724789999.

It is a balanced prime because it is at equal distance from previous prime (999987421) and next prime (999987433).

It is a cyclic number.

It is not a de Polignac number, because 999987427 - 2⁷ = 999987299 is a prime.

It is not a weakly prime, because it can be changed into another prime (999987421) 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, 499993713 + 499993714.

It is an arithmetic number, because the mean of its divisors is an integer number (499993714).

Almost surely, 2^999987427 is an apocalyptic number.

999987427 is a deficient number, since it is larger than the sum of its proper divisors (1).

999987427 is an equidigital number, since it uses as much as digits as its factorization.

999987427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20575296, while the sum is 64.

The square root of 999987427 is about 31622.5778044738. The cubic root of 999987427 is about 999.9958089824.

The spelling of 999987427 in words is "nine hundred ninety-nine million, nine hundred eighty-seven thousand, four hundred twenty-seven".