1990513 has 16 divisors (see below), whose sum is σ = 2471040. Its totient is φ = 1564416.

The previous prime is 1990507. The next prime is 1990523. The reversal of 1990513 is 3150991.

It is not a de Polignac number, because 1990513 - 2⁵ = 1990481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4923 + ... + 5311.

It is an arithmetic number, because the mean of its divisors is an integer number (154440).

2^1990513 is an apocalyptic number.

It is an amenable number.

1990513 is a deficient number, since it is larger than the sum of its proper divisors (480527).

1990513 is a wasteful number, since it uses less digits than its factorization.

1990513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 1990513 is about 1410.8554142789. The cubic root of 1990513 is about 125.7925746487.

The spelling of 1990513 in words is "one million, nine hundred ninety thousand, five hundred thirteen".