999751663 has 2 divisors, whose sum is σ = 999751664. Its totient is φ = 999751662.

The previous prime is 999751651. The next prime is 999751693. The reversal of 999751663 is 366157999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999751663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999751693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499875831 + 499875832.

It is an arithmetic number, because the mean of its divisors is an integer number (499875832).

Almost surely, 2^999751663 is an apocalyptic number.

999751663 is a deficient number, since it is larger than the sum of its proper divisors (1).

999751663 is an equidigital number, since it uses as much as digits as its factorization.

999751663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2755620, while the sum is 55.

The square root of 999751663 is about 31618.8498051400. The cubic root of 999751663 is about 999.9172141467.

The spelling of 999751663 in words is "nine hundred ninety-nine million, seven hundred fifty-one thousand, six hundred sixty-three".