90789671 has 16 divisors (see below), whose sum is σ = 108562944. Its totient is φ = 74235744.

The previous prime is 90789653. The next prime is 90789683. The reversal of 90789671 is 17698709.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90789671 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90789631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103085 + ... + 103961.

It is an arithmetic number, because the mean of its divisors is an integer number (6785184).

Almost surely, 2^90789671 is an apocalyptic number.

90789671 is a deficient number, since it is larger than the sum of its proper divisors (17773273).

90789671 is a wasteful number, since it uses less digits than its factorization.

90789671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 90789671 is about 9528.3614016262. The cubic root of 90789671 is about 449.4473396438.

The spelling of 90789671 in words is "ninety million, seven hundred eighty-nine thousand, six hundred seventy-one".