288949217 has 4 divisors (see below), whose sum is σ = 289046676. Its totient is φ = 288851760.

The previous prime is 288949211. The next prime is 288949229. The reversal of 288949217 is 712949882.

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 202663696 + 86285521 = 14236^2 + 9289^2 .

It is a cyclic number.

It is not a de Polignac number, because 288949217 - 2²⁴ = 272172001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (288949211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44138 + ... + 50259.

It is an arithmetic number, because the mean of its divisors is an integer number (72261669).

Almost surely, 2^288949217 is an apocalyptic number.

It is an amenable number.

288949217 is a deficient number, since it is larger than the sum of its proper divisors (97459).

288949217 is an equidigital number, since it uses as much as digits as its factorization.

288949217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97458.

The product of its digits is 580608, while the sum is 50.

The square root of 288949217 is about 16998.5063167327. The cubic root of 288949217 is about 661.1101739433.

The spelling of 288949217 in words is "two hundred eighty-eight million, nine hundred forty-nine thousand, two hundred seventeen".