1900639447073 has 2 divisors, whose sum is σ = 1900639447074. Its totient is φ = 1900639447072.

The previous prime is 1900639447051. The next prime is 1900639447087. The reversal of 1900639447073 is 3707449360091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1379807321104 + 520832125969 = 1174652^2 + 721687^2 .

It is a cyclic number.

It is not a de Polignac number, because 1900639447073 - 2³⁰ = 1899565705249 is a prime.

It is a super-2 number, since 2×1900639447073² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1900639447043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950319723536 + 950319723537.

It is an arithmetic number, because the mean of its divisors is an integer number (950319723537).

Almost surely, 2^{1900639447073} is an apocalyptic number.

It is an amenable number.

1900639447073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1900639447073 is an equidigital number, since it uses as much as digits as its factorization.

1900639447073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3429216, while the sum is 53.

The spelling of 1900639447073 in words is "one trillion, nine hundred billion, six hundred thirty-nine million, four hundred forty-seven thousand, seventy-three".