90641071 has 4 divisors (see below), whose sum is σ = 91659600. Its totient is φ = 89622544.

The previous prime is 90641053. The next prime is 90641113. The reversal of 90641071 is 17014609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90641071 - 2¹¹ = 90639023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90641011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509131 + ... + 509308.

It is an arithmetic number, because the mean of its divisors is an integer number (22914900).

Almost surely, 2^90641071 is an apocalyptic number.

90641071 is a deficient number, since it is larger than the sum of its proper divisors (1018529).

90641071 is a wasteful number, since it uses less digits than its factorization.

90641071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018528.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 90641071 is about 9520.5604351845. The cubic root of 90641071 is about 449.2019947514.

The spelling of 90641071 in words is "ninety million, six hundred forty-one thousand, seventy-one".