1999427 has 8 divisors (see below), whose sum is σ = 2150400. Its totient is φ = 1853064.

The previous prime is 1999423. The next prime is 1999441. The reversal of 1999427 is 7249991.

It is a happy number.

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 1999427 - 2² = 1999423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999423) 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, 227 + ... + 2012.

It is an arithmetic number, because the mean of its divisors is an integer number (268800).

2^1999427 is an apocalyptic number.

1999427 is a deficient number, since it is larger than the sum of its proper divisors (150973).

1999427 is a wasteful number, since it uses less digits than its factorization.

1999427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305.

The product of its digits is 40824, while the sum is 41.

The square root of 1999427 is about 1414.0109617680. The cubic root of 1999427 is about 125.9800715942.

The spelling of 1999427 in words is "one million, nine hundred ninety-nine thousand, four hundred twenty-seven".