247145473 has 8 divisors (see below), whose sum is σ = 261874728. Its totient is φ = 232437504.

The previous prime is 247145461. The next prime is 247145491. The reversal of 247145473 is 374541742.

It can be written as a sum of positive squares in 4 ways, for example, as 75220929 + 171924544 = 8673^2 + 13112^2 .

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 247145473 - 2⁵ = 247145441 is a prime.

It is a super-2 number, since 2×247145473² = 122161769648787458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247145443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22915 + ... + 31927.

It is an arithmetic number, because the mean of its divisors is an integer number (32734341).

Almost surely, 2^247145473 is an apocalyptic number.

It is an amenable number.

247145473 is a deficient number, since it is larger than the sum of its proper divisors (14729255).

247145473 is a wasteful number, since it uses less digits than its factorization.

247145473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10643.

The product of its digits is 94080, while the sum is 37.

The square root of 247145473 is about 15720.8610769258. The cubic root of 247145473 is about 627.5536886281.

The spelling of 247145473 in words is "two hundred forty-seven million, one hundred forty-five thousand, four hundred seventy-three".