2921661313 has 2 divisors, whose sum is σ = 2921661314. Its totient is φ = 2921661312.

The previous prime is 2921661283. The next prime is 2921661317. The reversal of 2921661313 is 3131661292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2769706384 + 151954929 = 52628^2 + 12327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2921661313 is a prime.

It is a super-2 number, since 2×2921661313² = 17072209655761767938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2921661317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460830656 + 1460830657.

It is an arithmetic number, because the mean of its divisors is an integer number (1460830657).

Almost surely, 2^2921661313 is an apocalyptic number.

It is an amenable number.

2921661313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2921661313 is an equidigital number, since it uses as much as digits as its factorization.

2921661313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 2921661313 is about 54052.3941467906. The cubic root of 2921661313 is about 1429.5849143269.

The spelling of 2921661313 in words is "two billion, nine hundred twenty-one million, six hundred sixty-one thousand, three hundred thirteen".