999445541 has 2 divisors, whose sum is σ = 999445542. Its totient is φ = 999445540.

The previous prime is 999445537. The next prime is 999445547. The reversal of 999445541 is 145544999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997612225 + 1833316 = 31585^2 + 1354^2 .

It is a cyclic number.

It is not a de Polignac number, because 999445541 - 2² = 999445537 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999445541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999445547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499722770 + 499722771.

It is an arithmetic number, because the mean of its divisors is an integer number (499722771).

Almost surely, 2^999445541 is an apocalyptic number.

It is an amenable number.

999445541 is a deficient number, since it is larger than the sum of its proper divisors (1).

999445541 is an equidigital number, since it uses as much as digits as its factorization.

999445541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1166400, while the sum is 50.

The square root of 999445541 is about 31614.0086195977. The cubic root of 999445541 is about 999.8151461645.

The spelling of 999445541 in words is "nine hundred ninety-nine million, four hundred forty-five thousand, five hundred forty-one".