90640727 has 2 divisors, whose sum is σ = 90640728. Its totient is φ = 90640726.

The previous prime is 90640717. The next prime is 90640751. The reversal of 90640727 is 72704609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90640727 - 2⁸ = 90640471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90640717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45320363 + 45320364.

It is an arithmetic number, because the mean of its divisors is an integer number (45320364).

Almost surely, 2^90640727 is an apocalyptic number.

90640727 is a deficient number, since it is larger than the sum of its proper divisors (1).

90640727 is an equidigital number, since it uses as much as digits as its factorization.

90640727 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 90640727 is about 9520.5423690040. The cubic root of 90640727 is about 449.2014264818.

The spelling of 90640727 in words is "ninety million, six hundred forty thousand, seven hundred twenty-seven".