90667571 has 2 divisors, whose sum is σ = 90667572. Its totient is φ = 90667570.

The previous prime is 90667561. The next prime is 90667597. The reversal of 90667571 is 17576609.

It is a weak prime.

It is an emirp because it is prime and its reverse (17576609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90667571 - 2¹⁰ = 90666547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90667531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45333785 + 45333786.

It is an arithmetic number, because the mean of its divisors is an integer number (45333786).

Almost surely, 2^90667571 is an apocalyptic number.

90667571 is a deficient number, since it is larger than the sum of its proper divisors (1).

90667571 is an equidigital number, since it uses as much as digits as its factorization.

90667571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 90667571 is about 9521.9520582704. The cubic root of 90667571 is about 449.2457670092.

The spelling of 90667571 in words is "ninety million, six hundred sixty-seven thousand, five hundred seventy-one".