1798731601 has 2 divisors, whose sum is σ = 1798731602. Its totient is φ = 1798731600.

The previous prime is 1798731593. The next prime is 1798731611. The reversal of 1798731601 is 1061378971.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164447376 + 634284225 = 34124^2 + 25185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798731601 - 2³ = 1798731593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1798731611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899365800 + 899365801.

It is an arithmetic number, because the mean of its divisors is an integer number (899365801).

Almost surely, 2^1798731601 is an apocalyptic number.

It is an amenable number.

1798731601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798731601 is an equidigital number, since it uses as much as digits as its factorization.

1798731601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 1798731601 is about 42411.4560113185. The cubic root of 1798731601 is about 1216.1546038656.

The spelling of 1798731601 in words is "one billion, seven hundred ninety-eight million, seven hundred thirty-one thousand, six hundred one".