249609946 has 16 divisors (see below), whose sum is σ = 399072960. Its totient is φ = 116683200.

The previous prime is 249609911. The next prime is 249609949. The reversal of 249609946 is 649906942.

It is a self number, because there is not a number n which added to its sum of digits gives 249609946.

It is not an unprimeable number, because it can be changed into a prime (249609949) 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 7 ways as a sum of consecutive naturals, for example, 19176 + ... + 29443.

It is an arithmetic number, because the mean of its divisors is an integer number (24942060).

Almost surely, 2^249609946 is an apocalyptic number.

249609946 is a deficient number, since it is larger than the sum of its proper divisors (149463014).

249609946 is a wasteful number, since it uses less digits than its factorization.

249609946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48789.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 249609946 is about 15799.0488954241. The cubic root of 249609946 is about 629.6327295810.

The spelling of 249609946 in words is "two hundred forty-nine million, six hundred nine thousand, nine hundred forty-six".