249344543 has 16 divisors (see below), whose sum is σ = 300407040. Its totient is φ = 202176000.

The previous prime is 249344531. The next prime is 249344569. The reversal of 249344543 is 345443942.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 249344543 - 2¹⁰ = 249343519 is a prime.

It is a super-2 number, since 2×249344543² = 124345402247757698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249344497 and 249344506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249344503) 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 15 ways as a sum of consecutive naturals, for example, 154943 + ... + 156543.

It is an arithmetic number, because the mean of its divisors is an integer number (18775440).

Almost surely, 2^249344543 is an apocalyptic number.

249344543 is a deficient number, since it is larger than the sum of its proper divisors (51062497).

249344543 is a wasteful number, since it uses less digits than its factorization.

249344543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798.

The product of its digits is 207360, while the sum is 38.

The square root of 249344543 is about 15790.6473268198. The cubic root of 249344543 is about 629.4094937157.

The spelling of 249344543 in words is "two hundred forty-nine million, three hundred forty-four thousand, five hundred forty-three".