1009920001 has 2 divisors, whose sum is σ = 1009920002. Its totient is φ = 1009920000.

The previous prime is 1009919993. The next prime is 1009920007. The reversal of 1009920001 is 1000299001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851764225 + 158155776 = 29185^2 + 12576^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009920001 - 2³ = 1009919993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1009920007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504960000 + 504960001.

It is an arithmetic number, because the mean of its divisors is an integer number (504960001).

Almost surely, 2^1009920001 is an apocalyptic number.

It is an amenable number.

1009920001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009920001 is an equidigital number, since it uses as much as digits as its factorization.

1009920001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 1009920001 is about 31779.2385213995. The cubic root of 1009920001 is about 1003.2957928165.

The spelling of 1009920001 in words is "one billion, nine million, nine hundred twenty thousand, one".