999399701 has 2 divisors, whose sum is σ = 999399702. Its totient is φ = 999399700.

The previous prime is 999399683. The next prime is 999399707. The reversal of 999399701 is 107993999.

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., 694059025 + 305340676 = 26345^2 + 17474^2 .

It is a cyclic number.

It is not a de Polignac number, because 999399701 - 2²⁶ = 932290837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999399707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499699850 + 499699851.

It is an arithmetic number, because the mean of its divisors is an integer number (499699851).

Almost surely, 2^999399701 is an apocalyptic number.

It is an amenable number.

999399701 is a deficient number, since it is larger than the sum of its proper divisors (1).

999399701 is an equidigital number, since it uses as much as digits as its factorization.

999399701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1240029, while the sum is 56.

The square root of 999399701 is about 31613.2836162269. The cubic root of 999399701 is about 999.7998602801.

The spelling of 999399701 in words is "nine hundred ninety-nine million, three hundred ninety-nine thousand, seven hundred one".