909387641 has 2 divisors, whose sum is σ = 909387642. Its totient is φ = 909387640.

The previous prime is 909387637. The next prime is 909387649. The reversal of 909387641 is 146783909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516198400 + 393189241 = 22720^2 + 19829^2 .

It is a cyclic number.

It is not a de Polignac number, because 909387641 - 2² = 909387637 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (909387649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 454693820 + 454693821.

It is an arithmetic number, because the mean of its divisors is an integer number (454693821).

Almost surely, 2^909387641 is an apocalyptic number.

It is an amenable number.

909387641 is a deficient number, since it is larger than the sum of its proper divisors (1).

909387641 is an equidigital number, since it uses as much as digits as its factorization.

909387641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 909387641 is about 30156.0547983320. The cubic root of 909387641 is about 968.8346940813.

The spelling of 909387641 in words is "nine hundred nine million, three hundred eighty-seven thousand, six hundred forty-one".