1798549117 has 16 divisors (see below), whose sum is σ = 1857980592. Its totient is φ = 1740211200.

The previous prime is 1798549079. The next prime is 1798549157. The reversal of 1798549117 is 7119458971.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 397244761 + 1401304356 = 19931^2 + 37434^2 .

It is a cyclic number.

It is not a de Polignac number, because 1798549117 - 2¹⁹ = 1798024829 is a prime.

It is a super-2 number, since 2×1798549117² = 6469557852522959378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1798549157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1803463 + ... + 1804459.

It is an arithmetic number, because the mean of its divisors is an integer number (116123787).

Almost surely, 2^1798549117 is an apocalyptic number.

It is an amenable number.

1798549117 is a deficient number, since it is larger than the sum of its proper divisors (59431475).

1798549117 is a wasteful number, since it uses less digits than its factorization.

1798549117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488.

The product of its digits is 635040, while the sum is 52.

The square root of 1798549117 is about 42409.3046040607. The cubic root of 1798549117 is about 1216.1134755761.

The spelling of 1798549117 in words is "one billion, seven hundred ninety-eight million, five hundred forty-nine thousand, one hundred seventeen".