247899065 has 12 divisors (see below), whose sum is σ = 299118564. Its totient is φ = 197231904.

The previous prime is 247899017. The next prime is 247899089. The reversal of 247899065 is 560998742.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 155950144 + 91948921 = 12488^2 + 9589^2 .

It is not a de Polignac number, because 247899065 - 2¹⁴ = 247882681 is a prime.

It is a super-2 number, since 2×247899065² = 122907892855748450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248147 + ... + 249143.

It is an arithmetic number, because the mean of its divisors is an integer number (24926547).

Almost surely, 2^247899065 is an apocalyptic number.

It is an amenable number.

247899065 is a deficient number, since it is larger than the sum of its proper divisors (51219499).

247899065 is an frugal number, since it uses more digits than its factorization.

247899065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 247899065 is about 15744.8107324286. The cubic root of 247899065 is about 628.1908836283.

The spelling of 247899065 in words is "two hundred forty-seven million, eight hundred ninety-nine thousand, sixty-five".