1992172801 has 2 divisors, whose sum is σ = 1992172802. Its totient is φ = 1992172800.

The previous prime is 1992172771. The next prime is 1992172837. The reversal of 1992172801 is 1082712991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1648441201 + 343731600 = 40601^2 + 18540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1992172801 - 2⁹ = 1992172289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1992170801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996086400 + 996086401.

It is an arithmetic number, because the mean of its divisors is an integer number (996086401).

Almost surely, 2^1992172801 is an apocalyptic number.

It is an amenable number.

1992172801 is a deficient number, since it is larger than the sum of its proper divisors (1).

1992172801 is an equidigital number, since it uses as much as digits as its factorization.

1992172801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 1992172801 is about 44633.7630163534. The cubic root of 1992172801 is about 1258.2752922817.

The spelling of 1992172801 in words is "one billion, nine hundred ninety-two million, one hundred seventy-two thousand, eight hundred one".