1922072497 has 4 divisors (see below), whose sum is σ = 1968952356. Its totient is φ = 1875192640.

The previous prime is 1922072491. The next prime is 1922072531. The reversal of 1922072497 is 7942702291.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 632975281 + 1289097216 = 25159^2 + 35904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1922072497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1922072491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23439868 + ... + 23439949.

It is an arithmetic number, because the mean of its divisors is an integer number (492238089).

Almost surely, 2^1922072497 is an apocalyptic number.

It is an amenable number.

1922072497 is a deficient number, since it is larger than the sum of its proper divisors (46879859).

1922072497 is an equidigital number, since it uses as much as digits as its factorization.

1922072497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46879858.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 1922072497 is about 43841.4472502904. The cubic root of 1922072497 is about 1243.3400450458.

The spelling of 1922072497 in words is "one billion, nine hundred twenty-two million, seventy-two thousand, four hundred ninety-seven".