1699999111001 has 2 divisors, whose sum is σ = 1699999111002. Its totient is φ = 1699999111000.

The previous prime is 1699999110973. The next prime is 1699999111009. The reversal of 1699999111001 is 1001119999961.

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., 996163686400 + 703835424601 = 998080^2 + 838949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1699999111001 - 2³⁸ = 1425121204057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1699999111009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849999555500 + 849999555501.

It is an arithmetic number, because the mean of its divisors is an integer number (849999555501).

Almost surely, 2^{1699999111001} is an apocalyptic number.

It is an amenable number.

1699999111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1699999111001 is an equidigital number, since it uses as much as digits as its factorization.

1699999111001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 354294, while the sum is 56.

The spelling of 1699999111001 in words is "one trillion, six hundred ninety-nine billion, nine hundred ninety-nine million, one hundred eleven thousand, one".