90487871 has 2 divisors, whose sum is σ = 90487872. Its totient is φ = 90487870.

The previous prime is 90487847. The next prime is 90487883. The reversal of 90487871 is 17878409.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90487871 - 2¹⁴ = 90471487 is a prime.

It is a super-2 number, since 2×90487871² = 16376109596225282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90487841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45243935 + 45243936.

It is an arithmetic number, because the mean of its divisors is an integer number (45243936).

Almost surely, 2^90487871 is an apocalyptic number.

90487871 is a deficient number, since it is larger than the sum of its proper divisors (1).

90487871 is an equidigital number, since it uses as much as digits as its factorization.

90487871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 90487871 is about 9512.5112877725. The cubic root of 90487871 is about 448.9487741719.

The spelling of 90487871 in words is "ninety million, four hundred eighty-seven thousand, eight hundred seventy-one".