291790146649 has 2 divisors, whose sum is σ = 291790146650. Its totient is φ = 291790146648.

The previous prime is 291790146589. The next prime is 291790146667. The reversal of 291790146649 is 946641097192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244372035600 + 47418111049 = 494340^2 + 217757^2 .

It is a cyclic number.

It is not a de Polignac number, because 291790146649 - 2¹⁷ = 291790015577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 291790146593 and 291790146602.

It is not a weakly prime, because it can be changed into another prime (291790146689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145895073324 + 145895073325.

It is an arithmetic number, because the mean of its divisors is an integer number (145895073325).

Almost surely, 2^291790146649 is an apocalyptic number.

It is an amenable number.

291790146649 is a deficient number, since it is larger than the sum of its proper divisors (1).

291790146649 is an equidigital number, since it uses as much as digits as its factorization.

291790146649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 291790146649 in words is "two hundred ninety-one billion, seven hundred ninety million, one hundred forty-six thousand, six hundred forty-nine".