1620133 has 2 divisors, whose sum is σ = 1620134. Its totient is φ = 1620132.

The previous prime is 1620121. The next prime is 1620161. The reversal of 1620133 is 3310261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1595169 + 24964 = 1263^2 + 158^2 .

It is an emirp because it is prime and its reverse (3310261) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620133 is a prime.

1620133 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810066 + 810067.

It is an arithmetic number, because the mean of its divisors is an integer number (810067).

2^1620133 is an apocalyptic number.

It is an amenable number.

1620133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620133 is an equidigital number, since it uses as much as digits as its factorization.

1620133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1620133 is about 1272.8444523979. The cubic root of 1620133 is about 117.4492432051.

Adding to 1620133 its reverse (3310261), we get a palindrome (4930394).

The spelling of 1620133 in words is "one million, six hundred twenty thousand, one hundred thirty-three".