1922403661 has 2 divisors, whose sum is σ = 1922403662. Its totient is φ = 1922403660.

The previous prime is 1922403629. The next prime is 1922403671. The reversal of 1922403661 is 1663042291.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1432622500 + 489781161 = 37850^2 + 22131^2 .

It is an emirp because it is prime and its reverse (1663042291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1922403661 - 2⁵ = 1922403629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1922403601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961201830 + 961201831.

It is an arithmetic number, because the mean of its divisors is an integer number (961201831).

Almost surely, 2^1922403661 is an apocalyptic number.

It is an amenable number.

1922403661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1922403661 is an equidigital number, since it uses as much as digits as its factorization.

1922403661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 1922403661 is about 43845.2239246192. The cubic root of 1922403661 is about 1243.4114481481.

The spelling of 1922403661 in words is "one billion, nine hundred twenty-two million, four hundred three thousand, six hundred sixty-one".