247242293 has 4 divisors (see below), whose sum is σ = 247409388. Its totient is φ = 247075200.

The previous prime is 247242283. The next prime is 247242301. The reversal of 247242293 is 392242742.

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

It can be written as a sum of positive squares in 2 ways, for example, as 213218404 + 34023889 = 14602^2 + 5833^2 .

It is a cyclic number.

It is not a de Polignac number, because 247242293 - 2⁴ = 247242277 is a prime.

It is a super-2 number, since 2×247242293² = 122257502895795698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247242283) 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 3 ways as a sum of consecutive naturals, for example, 81308 + ... + 84293.

It is an arithmetic number, because the mean of its divisors is an integer number (61852347).

Almost surely, 2^247242293 is an apocalyptic number.

It is an amenable number.

247242293 is a deficient number, since it is larger than the sum of its proper divisors (167095).

247242293 is a wasteful number, since it uses less digits than its factorization.

247242293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167094.

The product of its digits is 48384, while the sum is 35.

The square root of 247242293 is about 15723.9401232643. The cubic root of 247242293 is about 627.6356266258.

The spelling of 247242293 in words is "two hundred forty-seven million, two hundred forty-two thousand, two hundred ninety-three".