90975671 has 2 divisors, whose sum is σ = 90975672. Its totient is φ = 90975670.

The previous prime is 90975631. The next prime is 90975673. The reversal of 90975671 is 17657909.

It is a strong prime.

It is an emirp because it is prime and its reverse (17657909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90975671 - 2²² = 86781367 is a prime.

Together with 90975673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90975673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45487835 + 45487836.

It is an arithmetic number, because the mean of its divisors is an integer number (45487836).

Almost surely, 2^90975671 is an apocalyptic number.

90975671 is a deficient number, since it is larger than the sum of its proper divisors (1).

90975671 is an equidigital number, since it uses as much as digits as its factorization.

90975671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119070, while the sum is 44.

The square root of 90975671 is about 9538.1167428377. The cubic root of 90975671 is about 449.7540565528.

The spelling of 90975671 in words is "ninety million, nine hundred seventy-five thousand, six hundred seventy-one".