1898981 has 8 divisors (see below), whose sum is σ = 2203200. Its totient is φ = 1603008.

The previous prime is 1898977. The next prime is 1898983.

It is a happy number.

1898981 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1898981 - 2² = 1898977 is a prime.

It is a super-2 number, since 2×1898981² = 7212257676722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1898983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1556 + ... + 2493.

It is an arithmetic number, because the mean of its divisors is an integer number (275400).

2^1898981 is an apocalyptic number.

It is an amenable number.

1898981 is a deficient number, since it is larger than the sum of its proper divisors (304219).

1898981 is an equidigital number, since it uses as much as digits as its factorization.

1898981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4123.

The product of its digits is 41472, while the sum is 44.

The square root of 1898981 is about 1378.0351954867. The cubic root of 1898981 is about 123.8340869857.

The spelling of 1898981 in words is "one million, eight hundred ninety-eight thousand, nine hundred eighty-one".