1898497 has 4 divisors (see below), whose sum is σ = 1917396. Its totient is φ = 1879600.

The previous prime is 1898483. The next prime is 1898521. The reversal of 1898497 is 7948981.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1718721 + 179776 = 1311^2 + 424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1898497 - 2¹⁵ = 1865729 is a prime.

It is a Duffinian number.

1898497 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1898417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9298 + ... + 9499.

It is an arithmetic number, because the mean of its divisors is an integer number (479349).

It is a Proth number, since it is equal to 927 ⋅ 2¹¹ + 1 and 927 < 2¹¹.

2^1898497 is an apocalyptic number.

It is an amenable number.

1898497 is a deficient number, since it is larger than the sum of its proper divisors (18899).

1898497 is a wasteful number, since it uses less digits than its factorization.

1898497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18898.

The product of its digits is 145152, while the sum is 46.

The square root of 1898497 is about 1377.8595719448. The cubic root of 1898497 is about 123.8235654146.

The spelling of 1898497 in words is "one million, eight hundred ninety-eight thousand, four hundred ninety-seven".