3654931321 has 2 divisors, whose sum is σ = 3654931322. Its totient is φ = 3654931320.

The previous prime is 3654931307. The next prime is 3654931363. The reversal of 3654931321 is 1231394563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3532519225 + 122412096 = 59435^2 + 11064^2 .

It is a cyclic number.

It is not a de Polignac number, because 3654931321 - 2⁷ = 3654931193 is a prime.

It is a super-2 number, since 2×3654931321² = 26717045922453610082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3654931381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1827465660 + 1827465661.

It is an arithmetic number, because the mean of its divisors is an integer number (1827465661).

Almost surely, 2^3654931321 is an apocalyptic number.

It is an amenable number.

3654931321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3654931321 is an equidigital number, since it uses as much as digits as its factorization.

3654931321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 3654931321 is about 60456.0279955605. The cubic root of 3654931321 is about 1540.3748063095.

The spelling of 3654931321 in words is "three billion, six hundred fifty-four million, nine hundred thirty-one thousand, three hundred twenty-one".