999381701 has 2 divisors, whose sum is σ = 999381702. Its totient is φ = 999381700.

The previous prime is 999381697. The next prime is 999381793. The reversal of 999381701 is 107183999.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 886491076 + 112890625 = 29774^2 + 10625^2 .

It is a cyclic number.

It is not a de Polignac number, because 999381701 - 2² = 999381697 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999371701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499690850 + 499690851.

It is an arithmetic number, because the mean of its divisors is an integer number (499690851).

Almost surely, 2^999381701 is an apocalyptic number.

It is an amenable number.

999381701 is a deficient number, since it is larger than the sum of its proper divisors (1).

999381701 is an equidigital number, since it uses as much as digits as its factorization.

999381701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 47.

The square root of 999381701 is about 31612.9989244931. The cubic root of 999381701 is about 999.7938578417.

The spelling of 999381701 in words is "nine hundred ninety-nine million, three hundred eighty-one thousand, seven hundred one".