247909742 has 16 divisors (see below), whose sum is σ = 398727360. Its totient is φ = 115185408.

The previous prime is 247909733. The next prime is 247909747.

247909742 is nontrivially palindromic in base 10.

247909742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247909742² = 122918480357013128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 247909693 and 247909702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247909747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43463 + ... + 48834.

It is an arithmetic number, because the mean of its divisors is an integer number (24920460).

Almost surely, 2^247909742 is an apocalyptic number.

247909742 is a deficient number, since it is larger than the sum of its proper divisors (150817618).

247909742 is a wasteful number, since it uses less digits than its factorization.

247909742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92395.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 247909742 is about 15745.1497928727. The cubic root of 247909742 is about 628.1999022152.

The spelling of 247909742 in words is "two hundred forty-seven million, nine hundred nine thousand, seven hundred forty-two".