1990611 has 24 divisors (see below), whose sum is σ = 3461120. Its totient is φ = 1076976.

The previous prime is 1990607. The next prime is 1990621. The reversal of 1990611 is 1160991.

It is not a de Polignac number, because 1990611 - 2² = 1990607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366 + ... + 2028.

2^1990611 is an apocalyptic number.

1990611 is a deficient number, since it is larger than the sum of its proper divisors (1470509).

1990611 is a wasteful number, since it uses less digits than its factorization.

1990611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1695 (or 1692 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 1990611 is about 1410.8901445541. The cubic root of 1990611 is about 125.7946390194.

It can be divided in two parts, 1990 and 611, that added together give a square (2601 = 51²).

The spelling of 1990611 in words is "one million, nine hundred ninety thousand, six hundred eleven".