190203447893 has 2 divisors, whose sum is σ = 190203447894. Its totient is φ = 190203447892.

The previous prime is 190203447857. The next prime is 190203447913. The reversal of 190203447893 is 398744302091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154070380324 + 36133067569 = 392518^2 + 190087^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190203447893 is a prime.

It is a super-2 number, since 2×190203447893² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190203497893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95101723946 + 95101723947.

It is an arithmetic number, because the mean of its divisors is an integer number (95101723947).

Almost surely, 2^190203447893 is an apocalyptic number.

It is an amenable number.

190203447893 is a deficient number, since it is larger than the sum of its proper divisors (1).

190203447893 is an equidigital number, since it uses as much as digits as its factorization.

190203447893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 190203447893 in words is "one hundred ninety billion, two hundred three million, four hundred forty-seven thousand, eight hundred ninety-three".