249280646473 has 4 divisors (see below), whose sum is σ = 249856352788. Its totient is φ = 248704940160.

The previous prime is 249280646413. The next prime is 249280646507. The reversal of 249280646473 is 374646082942.

It is a happy number.

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 81354441529 + 167926204944 = 285227^2 + 409788^2 .

It is a cyclic number.

It is not a de Polignac number, because 249280646473 - 2²⁹ = 248743775561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249280646413) 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, 287852508 + ... + 287853373.

It is an arithmetic number, because the mean of its divisors is an integer number (62464088197).

Almost surely, 2^249280646473 is an apocalyptic number.

It is an amenable number.

249280646473 is a deficient number, since it is larger than the sum of its proper divisors (575706315).

249280646473 is an equidigital number, since it uses as much as digits as its factorization.

249280646473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575706314.

The product of its (nonzero) digits is 13934592, while the sum is 55.

The spelling of 249280646473 in words is "two hundred forty-nine billion, two hundred eighty million, six hundred forty-six thousand, four hundred seventy-three".