1650013 has 4 divisors (see below), whose sum is σ = 1706940. Its totient is φ = 1593088.

The previous prime is 1650001. The next prime is 1650023. The reversal of 1650013 is 3100561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3100561 = 23 ⋅134807.

It can be written as a sum of positive squares in 2 ways, for example, as 311364 + 1338649 = 558^2 + 1157^2 .

It is a cyclic number.

It is not a de Polignac number, because 1650013 - 2⁵ = 1649981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650023) 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, 28420 + ... + 28477.

It is an arithmetic number, because the mean of its divisors is an integer number (426735).

2^1650013 is an apocalyptic number.

It is an amenable number.

1650013 is a deficient number, since it is larger than the sum of its proper divisors (56927).

1650013 is an equidigital number, since it uses as much as digits as its factorization.

1650013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56926.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 1650013 is about 1284.5283180997. The cubic root of 1650013 is about 118.1668853824.

Adding to 1650013 its reverse (3100561), we get a palindrome (4750574).

The spelling of 1650013 in words is "one million, six hundred fifty thousand, thirteen".