905648831 has 2 divisors, whose sum is σ = 905648832. Its totient is φ = 905648830.

The previous prime is 905648819. The next prime is 905648867. The reversal of 905648831 is 138846509.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 905648831 - 2¹⁰ = 905647807 is a prime.

It is a super-2 number, since 2×905648831² = 1640399610183333122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (905648881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452824415 + 452824416.

It is an arithmetic number, because the mean of its divisors is an integer number (452824416).

Almost surely, 2^905648831 is an apocalyptic number.

905648831 is a deficient number, since it is larger than the sum of its proper divisors (1).

905648831 is an equidigital number, since it uses as much as digits as its factorization.

905648831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 905648831 is about 30093.9999169270. Note that the first 4 decimals coincide. The cubic root of 905648831 is about 967.5051311192.

The spelling of 905648831 in words is "nine hundred five million, six hundred forty-eight thousand, eight hundred thirty-one".