1899961312003 has 2 divisors, whose sum is σ = 1899961312004. Its totient is φ = 1899961312002.

The previous prime is 1899961311977. The next prime is 1899961312031. The reversal of 1899961312003 is 3002131699981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1899961312003 is a prime.

It is a super-2 number, since 2×1899961312003² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1899961312033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949980656001 + 949980656002.

It is an arithmetic number, because the mean of its divisors is an integer number (949980656002).

Almost surely, 2^{1899961312003} is an apocalyptic number.

1899961312003 is a deficient number, since it is larger than the sum of its proper divisors (1).

1899961312003 is an equidigital number, since it uses as much as digits as its factorization.

1899961312003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The spelling of 1899961312003 in words is "one trillion, eight hundred ninety-nine billion, nine hundred sixty-one million, three hundred twelve thousand, three".