1660413 has 4 divisors (see below), whose sum is σ = 2213888. Its totient is φ = 1106940.

The previous prime is 1660411. The next prime is 1660423. The reversal of 1660413 is 3140661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1660413 - 2¹ = 1660411 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1660413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660411) 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, 276733 + ... + 276738.

It is an arithmetic number, because the mean of its divisors is an integer number (553472).

2^1660413 is an apocalyptic number.

It is an amenable number.

1660413 is a deficient number, since it is larger than the sum of its proper divisors (553475).

1660413 is an equidigital number, since it uses as much as digits as its factorization.

1660413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553474.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1660413 is about 1288.5701377884. The cubic root of 1660413 is about 118.4146334558.

The spelling of 1660413 in words is "one million, six hundred sixty thousand, four hundred thirteen".