247249973 has 4 divisors (see below), whose sum is σ = 248767008. Its totient is φ = 245732940.

The previous prime is 247249949. The next prime is 247249987. The reversal of 247249973 is 379942742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 247249973 - 2¹⁴ = 247233589 is a prime.

It is a super-2 number, since 2×247249973² = 122265098297001458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247249913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758273 + ... + 758598.

It is an arithmetic number, because the mean of its divisors is an integer number (62191752).

Almost surely, 2^247249973 is an apocalyptic number.

It is an amenable number.

247249973 is a deficient number, since it is larger than the sum of its proper divisors (1517035).

247249973 is a wasteful number, since it uses less digits than its factorization.

247249973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517034.

The product of its digits is 762048, while the sum is 47.

The square root of 247249973 is about 15724.1843349663. The cubic root of 247249973 is about 627.6421252331.

The spelling of 247249973 in words is "two hundred forty-seven million, two hundred forty-nine thousand, nine hundred seventy-three".