1799434421 has 2 divisors, whose sum is σ = 1799434422. Its totient is φ = 1799434420.

The previous prime is 1799434393. The next prime is 1799434447. The reversal of 1799434421 is 1244349971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1756531921 + 42902500 = 41911^2 + 6550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799434421 - 2¹⁰ = 1799433397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1799434321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899717210 + 899717211.

It is an arithmetic number, because the mean of its divisors is an integer number (899717211).

Almost surely, 2^1799434421 is an apocalyptic number.

It is an amenable number.

1799434421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1799434421 is an equidigital number, since it uses as much as digits as its factorization.

1799434421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 1799434421 is about 42419.7409350882. The cubic root of 1799434421 is about 1216.3129796304.

The spelling of 1799434421 in words is "one billion, seven hundred ninety-nine million, four hundred thirty-four thousand, four hundred twenty-one".