1963898 has 4 divisors (see below), whose sum is σ = 2945850. Its totient is φ = 981948.

The previous prime is 1963889. The next prime is 1963921. The reversal of 1963898 is 8983691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8983691 = 691 ⋅13001.

It can be written as a sum of positive squares in only one way, i.e., 1067089 + 896809 = 1033^2 + 947^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490973 + ... + 490976.

2^1963898 is an apocalyptic number.

1963898 is a deficient number, since it is larger than the sum of its proper divisors (981952).

1963898 is an equidigital number, since it uses as much as digits as its factorization.

1963898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981951.

The product of its digits is 93312, while the sum is 44.

The square root of 1963898 is about 1401.3914513797. The cubic root of 1963898 is about 125.2294027375.

The spelling of 1963898 in words is "one million, nine hundred sixty-three thousand, eight hundred ninety-eight".