249723489 has 32 divisors (see below), whose sum is σ = 376510464. Its totient is φ = 146361600.

The previous prime is 249723451. The next prime is 249723491. The reversal of 249723489 is 984327942.

It is not a de Polignac number, because 249723489 - 2¹¹ = 249721441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249723499) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47964 + ... + 52914.

It is an arithmetic number, because the mean of its divisors is an integer number (11765952).

Almost surely, 2^249723489 is an apocalyptic number.

It is an amenable number.

249723489 is a deficient number, since it is larger than the sum of its proper divisors (126786975).

249723489 is a wasteful number, since it uses less digits than its factorization.

249723489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5037.

The product of its digits is 870912, while the sum is 48.

The square root of 249723489 is about 15802.6418360982. The cubic root of 249723489 is about 629.7281845805.

The spelling of 249723489 in words is "two hundred forty-nine million, seven hundred twenty-three thousand, four hundred eighty-nine".