291027046649 has 2 divisors, whose sum is σ = 291027046650. Its totient is φ = 291027046648.

The previous prime is 291027046631. The next prime is 291027046721. The reversal of 291027046649 is 946640720192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267839371024 + 23187675625 = 517532^2 + 152275^2 .

It is a cyclic number.

It is not a de Polignac number, because 291027046649 - 2⁸ = 291027046393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 291027046597 and 291027046606.

It is not a weakly prime, because it can be changed into another prime (291027046549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145513523324 + 145513523325.

It is an arithmetic number, because the mean of its divisors is an integer number (145513523325).

Almost surely, 2^291027046649 is an apocalyptic number.

It is an amenable number.

291027046649 is a deficient number, since it is larger than the sum of its proper divisors (1).

291027046649 is an equidigital number, since it uses as much as digits as its factorization.

291027046649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 291027046649 in words is "two hundred ninety-one billion, twenty-seven million, forty-six thousand, six hundred forty-nine".