905662649 has 2 divisors, whose sum is σ = 905662650. Its totient is φ = 905662648.

The previous prime is 905662633. The next prime is 905662741. The reversal of 905662649 is 946266509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 842857024 + 62805625 = 29032^2 + 7925^2 .

It is a cyclic number.

It is not a de Polignac number, because 905662649 - 2⁴ = 905662633 is a prime.

It is not a weakly prime, because it can be changed into another prime (905662609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 452831324 + 452831325.

It is an arithmetic number, because the mean of its divisors is an integer number (452831325).

Almost surely, 2^905662649 is an apocalyptic number.

It is an amenable number.

905662649 is a deficient number, since it is larger than the sum of its proper divisors (1).

905662649 is an equidigital number, since it uses as much as digits as its factorization.

905662649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 905662649 is about 30094.2294966992. The cubic root of 905662649 is about 967.5100516864.

The spelling of 905662649 in words is "nine hundred five million, six hundred sixty-two thousand, six hundred forty-nine".