90943320647 has 2 divisors, whose sum is σ = 90943320648. Its totient is φ = 90943320646.

The previous prime is 90943320631. The next prime is 90943320661. The reversal of 90943320647 is 74602334909.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90943320647 - 2⁴ = 90943320631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90943329647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45471660323 + 45471660324.

It is an arithmetic number, because the mean of its divisors is an integer number (45471660324).

Almost surely, 2^90943320647 is an apocalyptic number.

90943320647 is a deficient number, since it is larger than the sum of its proper divisors (1).

90943320647 is an equidigital number, since it uses as much as digits as its factorization.

90943320647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 47.

The spelling of 90943320647 in words is "ninety billion, nine hundred forty-three million, three hundred twenty thousand, six hundred forty-seven".