79439573 has 2 divisors, whose sum is σ = 79439574. Its totient is φ = 79439572.

The previous prime is 79439567. The next prime is 79439593. The reversal of 79439573 is 37593497.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59876644 + 19562929 = 7738^2 + 4423^2 .

It is an emirp because it is prime and its reverse (37593497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79439573 - 2¹⁰ = 79438549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79439593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39719786 + 39719787.

It is an arithmetic number, because the mean of its divisors is an integer number (39719787).

Almost surely, 2^79439573 is an apocalyptic number.

It is an amenable number.

79439573 is a deficient number, since it is larger than the sum of its proper divisors (1).

79439573 is an equidigital number, since it uses as much as digits as its factorization.

79439573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 714420, while the sum is 47.

The square root of 79439573 is about 8912.8880280188. Note that the first 3 decimals coincide. The cubic root of 79439573 is about 429.8784098255.

The spelling of 79439573 in words is "seventy-nine million, four hundred thirty-nine thousand, five hundred seventy-three".