79138441 has 2 divisors, whose sum is σ = 79138442. Its totient is φ = 79138440.

The previous prime is 79138391. The next prime is 79138481. The reversal of 79138441 is 14483197.

79138441 is nontrivially palindromic in base 9.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73359225 + 5779216 = 8565^2 + 2404^2 .

It is an emirp because it is prime and its reverse (14483197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79138441 - 2¹⁵ = 79105673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79138441.

It is not a weakly prime, because it can be changed into another prime (79138481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39569220 + 39569221.

It is an arithmetic number, because the mean of its divisors is an integer number (39569221).

Almost surely, 2^79138441 is an apocalyptic number.

It is an amenable number.

79138441 is a deficient number, since it is larger than the sum of its proper divisors (1).

79138441 is an equidigital number, since it uses as much as digits as its factorization.

79138441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 79138441 is about 8895.9789230865. The cubic root of 79138441 is about 429.3345412603.

The spelling of 79138441 in words is "seventy-nine million, one hundred thirty-eight thousand, four hundred forty-one".