999627623 has 2 divisors, whose sum is σ = 999627624. Its totient is φ = 999627622.

The previous prime is 999627589. The next prime is 999627641. The reversal of 999627623 is 326726999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999627623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999627653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499813811 + 499813812.

It is an arithmetic number, because the mean of its divisors is an integer number (499813812).

Almost surely, 2^999627623 is an apocalyptic number.

999627623 is a deficient number, since it is larger than the sum of its proper divisors (1).

999627623 is an equidigital number, since it uses as much as digits as its factorization.

999627623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 53.

The square root of 999627623 is about 31616.8882561203. Note that the first 3 decimals coincide. The cubic root of 999627623 is about 999.8758589230.

The spelling of 999627623 in words is "nine hundred ninety-nine million, six hundred twenty-seven thousand, six hundred twenty-three".