79439449 has 2 divisors, whose sum is σ = 79439450. Its totient is φ = 79439448.

The previous prime is 79439443. The next prime is 79439483. The reversal of 79439449 is 94493497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69422224 + 10017225 = 8332^2 + 3165^2 .

It is a cyclic number.

It is not a de Polignac number, because 79439449 - 2³ = 79439441 is a prime.

It is not a weakly prime, because it can be changed into another prime (79439441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39719724 + 39719725.

It is an arithmetic number, because the mean of its divisors is an integer number (39719725).

Almost surely, 2^79439449 is an apocalyptic number.

It is an amenable number.

79439449 is a deficient number, since it is larger than the sum of its proper divisors (1).

79439449 is an equidigital number, since it uses as much as digits as its factorization.

79439449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 49.

The square root of 79439449 is about 8912.8810717972. The cubic root of 79439449 is about 429.8781861547.

The spelling of 79439449 in words is "seventy-nine million, four hundred thirty-nine thousand, four hundred forty-nine".