79555543 has 2 divisors, whose sum is σ = 79555544. Its totient is φ = 79555542.

The previous prime is 79555507. The next prime is 79555549. The reversal of 79555543 is 34555597.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79555543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79555543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79555549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39777771 + 39777772.

It is an arithmetic number, because the mean of its divisors is an integer number (39777772).

Almost surely, 2^79555543 is an apocalyptic number.

79555543 is a deficient number, since it is larger than the sum of its proper divisors (1).

79555543 is an equidigital number, since it uses as much as digits as its factorization.

79555543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472500, while the sum is 43.

The square root of 79555543 is about 8919.3914030050. The cubic root of 79555543 is about 430.0874943646.

The spelling of 79555543 in words is "seventy-nine million, five hundred fifty-five thousand, five hundred forty-three".