994543541 has 2 divisors, whose sum is σ = 994543542. Its totient is φ = 994543540.

The previous prime is 994543513. The next prime is 994543553. The reversal of 994543541 is 145345499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721137316 + 273406225 = 26854^2 + 16535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-994543541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 994543492 and 994543501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994543591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497271770 + 497271771.

It is an arithmetic number, because the mean of its divisors is an integer number (497271771).

Almost surely, 2^994543541 is an apocalyptic number.

It is an amenable number.

994543541 is a deficient number, since it is larger than the sum of its proper divisors (1).

994543541 is an equidigital number, since it uses as much as digits as its factorization.

994543541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 44.

The square root of 994543541 is about 31536.3843996106. The cubic root of 994543541 is about 998.1778621637.

The spelling of 994543541 in words is "nine hundred ninety-four million, five hundred forty-three thousand, five hundred forty-one".