1990127 has 4 divisors (see below), whose sum is σ = 1993560. Its totient is φ = 1986696.

The previous prime is 1990123. The next prime is 1990133. The reversal of 1990127 is 7210991.

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

It is a cyclic number.

It is not a de Polignac number, because 1990127 - 2² = 1990123 is a prime.

It is a super-2 number, since 2×1990127² = 7921210952258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1990127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 2085.

It is an arithmetic number, because the mean of its divisors is an integer number (498390).

2^1990127 is an apocalyptic number.

1990127 is a deficient number, since it is larger than the sum of its proper divisors (3433).

1990127 is an equidigital number, since it uses as much as digits as its factorization.

1990127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3432.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 1990127 is about 1410.7186112049. The cubic root of 1990127 is about 125.7844428970.

The spelling of 1990127 in words is "one million, nine hundred ninety thousand, one hundred twenty-seven".