79847242 has 4 divisors (see below), whose sum is σ = 119770866. Its totient is φ = 39923620.

The previous prime is 79847197. The next prime is 79847293. The reversal of 79847242 is 24274897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 47596201 + 32251041 = 6899^2 + 5679^2 .

It is an unprimeable number.

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, 19961809 + ... + 19961812.

Almost surely, 2^79847242 is an apocalyptic number.

79847242 is a deficient number, since it is larger than the sum of its proper divisors (39923624).

79847242 is a wasteful number, since it uses less digits than its factorization.

79847242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39923623.

The product of its digits is 225792, while the sum is 43.

The square root of 79847242 is about 8935.7283978420. The cubic root of 79847242 is about 430.6125073140.

It can be divided in two parts, 79847 and 242, that added together give a square (80089 = 283²).

The spelling of 79847242 in words is "seventy-nine million, eight hundred forty-seven thousand, two hundred forty-two".