79539541 has 2 divisors, whose sum is σ = 79539542. Its totient is φ = 79539540.

The previous prime is 79539539. The next prime is 79539563. The reversal of 79539541 is 14593597.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76632516 + 2907025 = 8754^2 + 1705^2 .

It is a cyclic number.

It is not a de Polignac number, because 79539541 - 2¹ = 79539539 is a prime.

Together with 79539539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79539571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39769770 + 39769771.

It is an arithmetic number, because the mean of its divisors is an integer number (39769771).

Almost surely, 2^79539541 is an apocalyptic number.

It is an amenable number.

79539541 is a deficient number, since it is larger than the sum of its proper divisors (1).

79539541 is an equidigital number, since it uses as much as digits as its factorization.

79539541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 43.

The square root of 79539541 is about 8918.4943235952. The cubic root of 79539541 is about 430.0586561412.

The spelling of 79539541 in words is "seventy-nine million, five hundred thirty-nine thousand, five hundred forty-one".