219048749 has 2 divisors, whose sum is σ = 219048750. Its totient is φ = 219048748.

The previous prime is 219048727. The next prime is 219048763. The reversal of 219048749 is 947840912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122655625 + 96393124 = 11075^2 + 9818^2 .

It is a cyclic number.

It is not a de Polignac number, because 219048749 - 2¹² = 219044653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219048799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109524374 + 109524375.

It is an arithmetic number, because the mean of its divisors is an integer number (109524375).

Almost surely, 2^219048749 is an apocalyptic number.

It is an amenable number.

219048749 is a deficient number, since it is larger than the sum of its proper divisors (1).

219048749 is an equidigital number, since it uses as much as digits as its factorization.

219048749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 219048749 is about 14800.2955713729. The cubic root of 219048749 is about 602.8097374940.

The spelling of 219048749 in words is "two hundred nineteen million, forty-eight thousand, seven hundred forty-nine".