1614641621 has 2 divisors, whose sum is σ = 1614641622. Its totient is φ = 1614641620.

The previous prime is 1614641617. The next prime is 1614641681. The reversal of 1614641621 is 1261464161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1355270596 + 259371025 = 36814^2 + 16105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1614641621 - 2² = 1614641617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1614641681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 807320810 + 807320811.

It is an arithmetic number, because the mean of its divisors is an integer number (807320811).

Almost surely, 2^1614641621 is an apocalyptic number.

It is an amenable number.

1614641621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1614641621 is an equidigital number, since it uses as much as digits as its factorization.

1614641621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 32.

The square root of 1614641621 is about 40182.6034621949. The cubic root of 1614641621 is about 1173.1639642234.

The spelling of 1614641621 in words is "one billion, six hundred fourteen million, six hundred forty-one thousand, six hundred twenty-one".