1899997 has 8 divisors (see below), whose sum is σ = 2112480. Its totient is φ = 1694160.

The previous prime is 1899983. The next prime is 1900009. The reversal of 1899997 is 7999981.

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 1899997 - 2¹¹ = 1897949 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1899907) 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, 1047 + ... + 2212.

It is an arithmetic number, because the mean of its divisors is an integer number (264060).

2^1899997 is an apocalyptic number.

It is an amenable number.

1899997 is a deficient number, since it is larger than the sum of its proper divisors (212483).

1899997 is a wasteful number, since it uses less digits than its factorization.

1899997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323.

The product of its digits is 367416, while the sum is 52.

The square root of 1899997 is about 1378.4037869942. The cubic root of 1899997 is about 123.8561677755.

It can be divided in two parts, 1 and 899997, that added together give a palindrome (899998).

The spelling of 1899997 in words is "one million, eight hundred ninety-nine thousand, nine hundred ninety-seven".