249807693473 has 4 divisors (see below), whose sum is σ = 269023669908. Its totient is φ = 230591717040.

The previous prime is 249807693469. The next prime is 249807693491. The reversal of 249807693473 is 374396708942.

249807693473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 94751305489 + 155056387984 = 307817^2 + 393772^2 .

It is a cyclic number.

It is not a de Polignac number, because 249807693473 - 2² = 249807693469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (249807693413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9607988198 + ... + 9607988223.

It is an arithmetic number, because the mean of its divisors is an integer number (67255917477).

Almost surely, 2^249807693473 is an apocalyptic number.

It is an amenable number.

249807693473 is a deficient number, since it is larger than the sum of its proper divisors (19215976435).

249807693473 is a wasteful number, since it uses less digits than its factorization.

249807693473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19215976434.

The product of its (nonzero) digits is 54867456, while the sum is 62.

The spelling of 249807693473 in words is "two hundred forty-nine billion, eight hundred seven million, six hundred ninety-three thousand, four hundred seventy-three".