1662613 has 4 divisors (see below), whose sum is σ = 1667968. Its totient is φ = 1657260.

The previous prime is 1662611. The next prime is 1662629. The reversal of 1662613 is 3162661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3162661 = 23 ⋅137507.

It is a cyclic number.

It is not a de Polignac number, because 1662613 - 2¹ = 1662611 is a prime.

It is a Duffinian number.

1662613 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662611) 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, 2181 + ... + 2842.

It is an arithmetic number, because the mean of its divisors is an integer number (416992).

2^1662613 is an apocalyptic number.

It is an amenable number.

1662613 is a deficient number, since it is larger than the sum of its proper divisors (5355).

1662613 is an equidigital number, since it uses as much as digits as its factorization.

1662613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5354.

The product of its digits is 1296, while the sum is 25.

The square root of 1662613 is about 1289.4235145987. The cubic root of 1662613 is about 118.4669090485.

The spelling of 1662613 in words is "one million, six hundred sixty-two thousand, six hundred thirteen".