2691064217 has 2 divisors, whose sum is σ = 2691064218. Its totient is φ = 2691064216.

The previous prime is 2691064177. The next prime is 2691064261. The reversal of 2691064217 is 7124601962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1982386576 + 708677641 = 44524^2 + 26621^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691064217 - 2²⁶ = 2623955353 is a prime.

It is not a weakly prime, because it can be changed into another prime (2690064217) 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 as a sum of consecutive naturals, namely, 1345532108 + 1345532109.

It is an arithmetic number, because the mean of its divisors is an integer number (1345532109).

Almost surely, 2^2691064217 is an apocalyptic number.

It is an amenable number.

2691064217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691064217 is an equidigital number, since it uses as much as digits as its factorization.

2691064217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 2691064217 is about 51875.4683545122. The cubic root of 2691064217 is about 1390.9387956104.

The spelling of 2691064217 in words is "two billion, six hundred ninety-one million, sixty-four thousand, two hundred seventeen".