1922939749 has 2 divisors, whose sum is σ = 1922939750. Its totient is φ = 1922939748.

The previous prime is 1922939713. The next prime is 1922939773. The reversal of 1922939749 is 9479392291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1916863524 + 6076225 = 43782^2 + 2465^2 .

It is an emirp because it is prime and its reverse (9479392291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1922939749 - 2²³ = 1914551141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1922939749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1922939779) 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, 961469874 + 961469875.

It is an arithmetic number, because the mean of its divisors is an integer number (961469875).

Almost surely, 2^1922939749 is an apocalyptic number.

It is an amenable number.

1922939749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1922939749 is an equidigital number, since it uses as much as digits as its factorization.

1922939749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 55.

The square root of 1922939749 is about 43851.3369123451. The cubic root of 1922939749 is about 1243.5270180495.

The spelling of 1922939749 in words is "one billion, nine hundred twenty-two million, nine hundred thirty-nine thousand, seven hundred forty-nine".