90280471 has 2 divisors, whose sum is σ = 90280472. Its totient is φ = 90280470.

The previous prime is 90280469. The next prime is 90280493. The reversal of 90280471 is 17408209.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90280471 - 2¹ = 90280469 is a prime.

It is a super-3 number, since 3×90280471³ (a number of 25 digits) contains 333 as substring.

Together with 90280469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90283471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45140235 + 45140236.

It is an arithmetic number, because the mean of its divisors is an integer number (45140236).

Almost surely, 2^90280471 is an apocalyptic number.

90280471 is a deficient number, since it is larger than the sum of its proper divisors (1).

90280471 is an equidigital number, since it uses as much as digits as its factorization.

90280471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 90280471 is about 9501.6036014980. The cubic root of 90280471 is about 448.6055119438.

The spelling of 90280471 in words is "ninety million, two hundred eighty thousand, four hundred seventy-one".