79441381 has 2 divisors, whose sum is σ = 79441382. Its totient is φ = 79441380.

The previous prime is 79441367. The next prime is 79441423. The reversal of 79441381 is 18314497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79121025 + 320356 = 8895^2 + 566^2 .

It is an emirp because it is prime and its reverse (18314497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79441381 - 2¹⁵ = 79408613 is a prime.

It is a super-2 number, since 2×79441381² = 12621866030374322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79441381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79441321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39720690 + 39720691.

It is an arithmetic number, because the mean of its divisors is an integer number (39720691).

Almost surely, 2^79441381 is an apocalyptic number.

It is an amenable number.

79441381 is a deficient number, since it is larger than the sum of its proper divisors (1).

79441381 is an equidigital number, since it uses as much as digits as its factorization.

79441381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 79441381 is about 8912.9894536009. The cubic root of 79441381 is about 429.8816710644.

The spelling of 79441381 in words is "seventy-nine million, four hundred forty-one thousand, three hundred eighty-one".