90745471 has 2 divisors, whose sum is σ = 90745472. Its totient is φ = 90745470.

The previous prime is 90745469. The next prime is 90745493. The reversal of 90745471 is 17454709.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90745471 - 2¹ = 90745469 is a prime.

It is a super-3 number, since 3×90745471³ (a number of 25 digits) contains 333 as substring.

Together with 90745469, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90745471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90745411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45372735 + 45372736.

It is an arithmetic number, because the mean of its divisors is an integer number (45372736).

Almost surely, 2^90745471 is an apocalyptic number.

90745471 is a deficient number, since it is larger than the sum of its proper divisors (1).

90745471 is an equidigital number, since it uses as much as digits as its factorization.

90745471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 90745471 is about 9526.0417278112. The cubic root of 90745471 is about 449.3743915619.

The spelling of 90745471 in words is "ninety million, seven hundred forty-five thousand, four hundred seventy-one".