999712229 has 2 divisors, whose sum is σ = 999712230. Its totient is φ = 999712228.

The previous prime is 999712199. The next prime is 999712247. The reversal of 999712229 is 922217999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 693532225 + 306180004 = 26335^2 + 17498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999712229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999712249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499856114 + 499856115.

It is an arithmetic number, because the mean of its divisors is an integer number (499856115).

Almost surely, 2^999712229 is an apocalyptic number.

It is an amenable number.

999712229 is a deficient number, since it is larger than the sum of its proper divisors (1).

999712229 is an equidigital number, since it uses as much as digits as its factorization.

999712229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416, while the sum is 50.

The square root of 999712229 is about 31618.2262152702. The cubic root of 999712229 is about 999.9040671305.

The spelling of 999712229 in words is "nine hundred ninety-nine million, seven hundred twelve thousand, two hundred twenty-nine".