247242279 has 8 divisors (see below), whose sum is σ = 330970752. Its totient is φ = 164171000.

The previous prime is 247242277. The next prime is 247242283. The reversal of 247242279 is 972242742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247242279 - 2¹ = 247242277 is a prime.

It is a super-2 number, since 2×247242279² = 122257489050227682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247242277) 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, 163419 + ... + 164924.

It is an arithmetic number, because the mean of its divisors is an integer number (41371344).

Almost surely, 2^247242279 is an apocalyptic number.

247242279 is a deficient number, since it is larger than the sum of its proper divisors (83728473).

247242279 is a wasteful number, since it uses less digits than its factorization.

247242279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328597.

The product of its digits is 112896, while the sum is 39.

The square root of 247242279 is about 15723.9396780832. The cubic root of 247242279 is about 627.6356147792.

The spelling of 247242279 in words is "two hundred forty-seven million, two hundred forty-two thousand, two hundred seventy-nine".