247047355 has 4 divisors (see below), whose sum is σ = 296456832. Its totient is φ = 197637880.

The previous prime is 247047343. The next prime is 247047371. The reversal of 247047355 is 553740742.

It is a happy number.

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

It is not a de Polignac number, because 247047355 - 2⁵ = 247047323 is a prime.

It is a super-2 number, since 2×247047355² = 122064791224992050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 24704731 + ... + 24704740.

It is an arithmetic number, because the mean of its divisors is an integer number (74114208).

Almost surely, 2^247047355 is an apocalyptic number.

247047355 is a deficient number, since it is larger than the sum of its proper divisors (49409477).

247047355 is an equidigital number, since it uses as much as digits as its factorization.

247047355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49409476.

The product of its (nonzero) digits is 117600, while the sum is 37.

The square root of 247047355 is about 15717.7401365463. The cubic root of 247047355 is about 627.4706303085.

The spelling of 247047355 in words is "two hundred forty-seven million, forty-seven thousand, three hundred fifty-five".