16961543 has 2 divisors, whose sum is σ = 16961544. Its totient is φ = 16961542.

The previous prime is 16961521. The next prime is 16961551. The reversal of 16961543 is 34516961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16961543 - 2¹⁰ = 16960519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16961513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8480771 + 8480772.

It is an arithmetic number, because the mean of its divisors is an integer number (8480772).

Almost surely, 2^16961543 is an apocalyptic number.

16961543 is a deficient number, since it is larger than the sum of its proper divisors (1).

16961543 is an equidigital number, since it uses as much as digits as its factorization.

16961543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 35.

The square root of 16961543 is about 4118.4393888948. The cubic root of 16961543 is about 256.9341229204.

The spelling of 16961543 in words is "sixteen million, nine hundred sixty-one thousand, five hundred forty-three".