1620660341 has 8 divisors (see below), whose sum is σ = 1691515224. Its totient is φ = 1551297280.

The previous prime is 1620660329. The next prime is 1620660359. The reversal of 1620660341 is 1430660261.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42902500 + 1577757841 = 6550^2 + 39721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1620660341 - 2²² = 1616466037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620660311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 370736 + ... + 375081.

It is an arithmetic number, because the mean of its divisors is an integer number (211439403).

Almost surely, 2^1620660341 is an apocalyptic number.

It is an amenable number.

1620660341 is a deficient number, since it is larger than the sum of its proper divisors (70854883).

1620660341 is an equidigital number, since it uses as much as digits as its factorization.

1620660341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745911.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1620660341 is about 40257.4259112527. The cubic root of 1620660341 is about 1174.6198476866.

The spelling of 1620660341 in words is "one billion, six hundred twenty million, six hundred sixty thousand, three hundred forty-one".