249788153 has 4 divisors (see below), whose sum is σ = 253306368. Its totient is φ = 246269940.

The previous prime is 249788101. The next prime is 249788159. The reversal of 249788153 is 351887942.

It is a happy number.

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 249788153 - 2⁸ = 249787897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249788098 and 249788107.

It is not an unprimeable number, because it can be changed into a prime (249788159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1759001 + ... + 1759142.

It is an arithmetic number, because the mean of its divisors is an integer number (63326592).

Almost surely, 2^249788153 is an apocalyptic number.

It is an amenable number.

249788153 is a deficient number, since it is larger than the sum of its proper divisors (3518215).

249788153 is an equidigital number, since it uses as much as digits as its factorization.

249788153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518214.

The product of its digits is 483840, while the sum is 47.

The square root of 249788153 is about 15804.6876906822. The cubic root of 249788153 is about 629.7825343325.

The spelling of 249788153 in words is "two hundred forty-nine million, seven hundred eighty-eight thousand, one hundred fifty-three".