1990207 has 4 divisors (see below), whose sum is σ = 2107296. Its totient is φ = 1873120.

The previous prime is 1990189. The next prime is 1990211. The reversal of 1990207 is 7020991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990207 is a prime.

It is a Duffinian number.

1990207 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990237) 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, 58519 + ... + 58552.

It is an arithmetic number, because the mean of its divisors is an integer number (526824).

2^1990207 is an apocalyptic number.

1990207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1990207 is a deficient number, since it is larger than the sum of its proper divisors (117089).

1990207 is a wasteful number, since it uses less digits than its factorization.

1990207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117088.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1990207 is about 1410.7469652634. The cubic root of 1990207 is about 125.7861283205.

It can be divided in two parts, 1990 and 207, that added together give a cube (2197 = 13³).

The spelling of 1990207 in words is "one million, nine hundred ninety thousand, two hundred seven".