1798547161 has 2 divisors, whose sum is σ = 1798547162. Its totient is φ = 1798547160.

The previous prime is 1798547159. The next prime is 1798547183. The reversal of 1798547161 is 1617458971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1756867225 + 41679936 = 41915^2 + 6456^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798547161 - 2¹ = 1798547159 is a prime.

Together with 1798547159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1798547461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899273580 + 899273581.

It is an arithmetic number, because the mean of its divisors is an integer number (899273581).

Almost surely, 2^1798547161 is an apocalyptic number.

It is an amenable number.

1798547161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798547161 is an equidigital number, since it uses as much as digits as its factorization.

1798547161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 49.

The square root of 1798547161 is about 42409.2815430773. The cubic root of 1798547161 is about 1216.1130347173.

The spelling of 1798547161 in words is "one billion, seven hundred ninety-eight million, five hundred forty-seven thousand, one hundred sixty-one".