999937223 has 2 divisors, whose sum is σ = 999937224. Its totient is φ = 999937222.

The previous prime is 999937219. The next prime is 999937231. The reversal of 999937223 is 322739999.

It is a weak prime.

It is an emirp because it is prime and its reverse (322739999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999937223 - 2² = 999937219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999937243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499968611 + 499968612.

It is an arithmetic number, because the mean of its divisors is an integer number (499968612).

Almost surely, 2^999937223 is an apocalyptic number.

999937223 is a deficient number, since it is larger than the sum of its proper divisors (1).

999937223 is an equidigital number, since it uses as much as digits as its factorization.

999937223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653372, while the sum is 53.

The square root of 999937223 is about 31621.7839945820. The cubic root of 999937223 is about 999.9790738954.

The spelling of 999937223 in words is "nine hundred ninety-nine million, nine hundred thirty-seven thousand, two hundred twenty-three".