249029819 has 2 divisors, whose sum is σ = 249029820. Its totient is φ = 249029818.

The previous prime is 249029761. The next prime is 249029831. The reversal of 249029819 is 918920942.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249029819 is a prime.

It is a super-2 number, since 2×249029819² = 124031701502345522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 249029819.

It is not a weakly prime, because it can be changed into another prime (249029839) 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 as a sum of consecutive naturals, namely, 124514909 + 124514910.

It is an arithmetic number, because the mean of its divisors is an integer number (124514910).

Almost surely, 2^249029819 is an apocalyptic number.

249029819 is a deficient number, since it is larger than the sum of its proper divisors (1).

249029819 is an equidigital number, since it uses as much as digits as its factorization.

249029819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 249029819 is about 15780.6786609448. The cubic root of 249029819 is about 629.1445675575.

The spelling of 249029819 in words is "two hundred forty-nine million, twenty-nine thousand, eight hundred nineteen".