249918163 has 8 divisors (see below), whose sum is σ = 272756736. Its totient is φ = 227099400.

The previous prime is 249918157. The next prime is 249918169. The reversal of 249918163 is 361819942.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (249918157) and next prime (249918169).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249918163 - 2²¹ = 247821011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249918169) 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, 36718 + ... + 42988.

It is an arithmetic number, because the mean of its divisors is an integer number (34094592).

Almost surely, 2^249918163 is an apocalyptic number.

249918163 is a deficient number, since it is larger than the sum of its proper divisors (22838573).

249918163 is a wasteful number, since it uses less digits than its factorization.

249918163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9905.

The product of its digits is 93312, while the sum is 43.

The square root of 249918163 is about 15808.8001758514. The cubic root of 249918163 is about 629.8917786729.

The spelling of 249918163 in words is "two hundred forty-nine million, nine hundred eighteen thousand, one hundred sixty-three".