1698944497 has 4 divisors (see below), whose sum is σ = 1757528820. Its totient is φ = 1640360176.

The previous prime is 1698944483. The next prime is 1698944531. The reversal of 1698944497 is 7944498961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7944498961 = 7 ⋅1134928423.

It can be written as a sum of positive squares in 2 ways, for example, as 478909456 + 1220035041 = 21884^2 + 34929^2 .

It is not a de Polignac number, because 1698944497 - 2¹⁹ = 1698420209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1698344497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29292118 + ... + 29292175.

It is an arithmetic number, because the mean of its divisors is an integer number (439382205).

Almost surely, 2^1698944497 is an apocalyptic number.

It is an amenable number.

1698944497 is a deficient number, since it is larger than the sum of its proper divisors (58584323).

1698944497 is an equidigital number, since it uses as much as digits as its factorization.

1698944497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58584322.

The product of its digits is 15676416, while the sum is 61.

The square root of 1698944497 is about 41218.2544147614. The cubic root of 1698944497 is about 1193.2361358697.

The spelling of 1698944497 in words is "one billion, six hundred ninety-eight million, nine hundred forty-four thousand, four hundred ninety-seven".