1920436249 has 2 divisors, whose sum is σ = 1920436250. Its totient is φ = 1920436248.

The previous prime is 1920436223. The next prime is 1920436279. The reversal of 1920436249 is 9426340291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1889467024 + 30969225 = 43468^2 + 5565^2 .

It is an emirp because it is prime and its reverse (9426340291) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1920436249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1920436279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960218124 + 960218125.

It is an arithmetic number, because the mean of its divisors is an integer number (960218125).

Almost surely, 2^1920436249 is an apocalyptic number.

It is an amenable number.

1920436249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920436249 is an equidigital number, since it uses as much as digits as its factorization.

1920436249 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 40.

The square root of 1920436249 is about 43822.7823055543. The cubic root of 1920436249 is about 1242.9871290775.

The spelling of 1920436249 in words is "one billion, nine hundred twenty million, four hundred thirty-six thousand, two hundred forty-nine".