2001698 has 4 divisors (see below), whose sum is σ = 3002550. Its totient is φ = 1000848.

The previous prime is 2001697. The next prime is 2001709. The reversal of 2001698 is 8961002.

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

It can be written as a sum of positive squares in only one way, i.e., 1723969 + 277729 = 1313^2 + 527^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2001691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500423 + ... + 500426.

2^2001698 is an apocalyptic number.

2001698 is a deficient number, since it is larger than the sum of its proper divisors (1000852).

2001698 is a wasteful number, since it uses less digits than its factorization.

2001698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000851.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2001698 is about 1414.8137686636. The cubic root of 2001698 is about 126.0277506694.

The spelling of 2001698 in words is "two million, one thousand, six hundred ninety-eight".