8709042442 has 4 divisors (see below), whose sum is σ = 13063563666. Its totient is φ = 4354521220.

The previous prime is 8709042409. The next prime is 8709042467. The reversal of 8709042442 is 2442409078.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2442409078 = 2 ⋅1221204539.

It can be written as a sum of positive squares in only one way, i.e., 8594958681 + 114083761 = 92709^2 + 10681^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8709042395 and 8709042404.

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, 2177260609 + ... + 2177260612.

Almost surely, 2^8709042442 is an apocalyptic number.

8709042442 is a deficient number, since it is larger than the sum of its proper divisors (4354521224).

8709042442 is a wasteful number, since it uses less digits than its factorization.

8709042442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354521223.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 8709042442 is about 93322.2505193697. The cubic root of 8709042442 is about 2057.4224243446.

The spelling of 8709042442 in words is "eight billion, seven hundred nine million, forty-two thousand, four hundred forty-two".