906775708621 has 2 divisors, whose sum is σ = 906775708622. Its totient is φ = 906775708620.

The previous prime is 906775708603. The next prime is 906775708661. The reversal of 906775708621 is 126807577609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 821178503721 + 85597204900 = 906189^2 + 292570^2 .

It is a cyclic number.

It is not a de Polignac number, because 906775708621 - 2⁵ = 906775708589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (906775708661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453387854310 + 453387854311.

It is an arithmetic number, because the mean of its divisors is an integer number (453387854311).

Almost surely, 2^906775708621 is an apocalyptic number.

It is an amenable number.

906775708621 is a deficient number, since it is larger than the sum of its proper divisors (1).

906775708621 is an equidigital number, since it uses as much as digits as its factorization.

906775708621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 906775708621 in words is "nine hundred six billion, seven hundred seventy-five million, seven hundred eight thousand, six hundred twenty-one".