1000999003601 has 2 divisors, whose sum is σ = 1000999003602. Its totient is φ = 1000999003600.

The previous prime is 1000999003553. The next prime is 1000999003643. The reversal of 1000999003601 is 1063009990001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766239373201 + 234759630400 = 875351^2 + 484520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000999003601 - 2¹⁴ = 1000998987217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1000999003651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500499501800 + 500499501801.

It is an arithmetic number, because the mean of its divisors is an integer number (500499501801).

Almost surely, 2^{1000999003601} is an apocalyptic number.

It is an amenable number.

1000999003601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000999003601 is an equidigital number, since it uses as much as digits as its factorization.

1000999003601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 38.

The spelling of 1000999003601 in words is "one trillion, nine hundred ninety-nine million, three thousand, six hundred one".