999928020001 has 2 divisors, whose sum is σ = 999928020002. Its totient is φ = 999928020000.

The previous prime is 999928019953. The next prime is 999928020017. The reversal of 999928020001 is 100020829999.

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., 997231918225 + 2696101776 = 998615^2 + 51924^2 .

It is a cyclic number.

It is not a de Polignac number, because 999928020001 - 2⁷ = 999928019873 is a prime.

It is not a weakly prime, because it can be changed into another prime (999928020031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499964010000 + 499964010001.

It is an arithmetic number, because the mean of its divisors is an integer number (499964010001).

Almost surely, 2^999928020001 is an apocalyptic number.

It is an amenable number.

999928020001 is a deficient number, since it is larger than the sum of its proper divisors (1).

999928020001 is an equidigital number, since it uses as much as digits as its factorization.

999928020001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 49.

The spelling of 999928020001 in words is "nine hundred ninety-nine billion, nine hundred twenty-eight million, twenty thousand, one".