999248641 has 2 divisors, whose sum is σ = 999248642. Its totient is φ = 999248640.

The previous prime is 999248633. The next prime is 999248687. The reversal of 999248641 is 146842999.

999248641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 777238641 + 222010000 = 27879^2 + 14900^2 .

It is a cyclic number.

It is not a de Polignac number, because 999248641 - 2³ = 999248633 is a prime.

It is not a weakly prime, because it can be changed into another prime (999248611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499624320 + 499624321.

It is an arithmetic number, because the mean of its divisors is an integer number (499624321).

Almost surely, 2^999248641 is an apocalyptic number.

It is an amenable number.

999248641 is a deficient number, since it is larger than the sum of its proper divisors (1).

999248641 is an equidigital number, since it uses as much as digits as its factorization.

999248641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 999248641 is about 31610.8943404011. The cubic root of 999248641 is about 999.7494842471.

The spelling of 999248641 in words is "nine hundred ninety-nine million, two hundred forty-eight thousand, six hundred forty-one".