79649543 has 2 divisors, whose sum is σ = 79649544. Its totient is φ = 79649542.

The previous prime is 79649477. The next prime is 79649561. The reversal of 79649543 is 34594697.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (34594697) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79649543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79645543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39824771 + 39824772.

It is an arithmetic number, because the mean of its divisors is an integer number (39824772).

Almost surely, 2^79649543 is an apocalyptic number.

79649543 is a deficient number, since it is larger than the sum of its proper divisors (1).

79649543 is an equidigital number, since it uses as much as digits as its factorization.

79649543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 79649543 is about 8924.6592652045. The cubic root of 79649543 is about 430.2568197212.

The spelling of 79649543 in words is "seventy-nine million, six hundred forty-nine thousand, five hundred forty-three".