999996541 has 2 divisors, whose sum is σ = 999996542. Its totient is φ = 999996540.

The previous prime is 999996493. The next prime is 999996587. The reversal of 999996541 is 145699999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999887641 + 108900 = 31621^2 + 330^2 .

It is a cyclic number.

It is not a de Polignac number, because 999996541 - 2⁹ = 999996029 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999996541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999996341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998270 + 499998271.

It is an arithmetic number, because the mean of its divisors is an integer number (499998271).

Almost surely, 2^999996541 is an apocalyptic number.

It is an amenable number.

999996541 is a deficient number, since it is larger than the sum of its proper divisors (1).

999996541 is an equidigital number, since it uses as much as digits as its factorization.

999996541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7085880, while the sum is 61.

The square root of 999996541 is about 31622.7219100444. The cubic root of 999996541 is about 999.9988469987.

The spelling of 999996541 in words is "nine hundred ninety-nine million, nine hundred ninety-six thousand, five hundred forty-one".