3326981921 has 2 divisors, whose sum is σ = 3326981922. Its totient is φ = 3326981920.

The previous prime is 3326981899. The next prime is 3326981927. The reversal of 3326981921 is 1291896233.

3326981921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2617345600 + 709636321 = 51160^2 + 26639^2 .

It is an emirp because it is prime and its reverse (1291896233) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3326981921 - 2¹⁰ = 3326980897 is a prime.

It is a super-2 number, since 2×3326981921² = 22137617405321700482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3326981927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1663490960 + 1663490961.

It is an arithmetic number, because the mean of its divisors is an integer number (1663490961).

Almost surely, 2^3326981921 is an apocalyptic number.

It is an amenable number.

3326981921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3326981921 is an equidigital number, since it uses as much as digits as its factorization.

3326981921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 3326981921 is about 57679.9958477807. The cubic root of 3326981921 is about 1492.8522039616.

The spelling of 3326981921 in words is "three billion, three hundred twenty-six million, nine hundred eighty-one thousand, nine hundred twenty-one".