90749471 has 2 divisors, whose sum is σ = 90749472. Its totient is φ = 90749470.

The previous prime is 90749459. The next prime is 90749521. The reversal of 90749471 is 17494709.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90749471 - 2²² = 86555167 is a prime.

It is a super-3 number, since 3×90749471³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90749401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45374735 + 45374736.

It is an arithmetic number, because the mean of its divisors is an integer number (45374736).

Almost surely, 2^90749471 is an apocalyptic number.

90749471 is a deficient number, since it is larger than the sum of its proper divisors (1).

90749471 is an equidigital number, since it uses as much as digits as its factorization.

90749471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 90749471 is about 9526.2516762891. The cubic root of 90749471 is about 449.3809941730.

The spelling of 90749471 in words is "ninety million, seven hundred forty-nine thousand, four hundred seventy-one".