90471169 has 4 divisors (see below), whose sum is σ = 90655920. Its totient is φ = 90286420.

The previous prime is 90471151. The next prime is 90471181. The reversal of 90471169 is 96117409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90471169 - 2⁵ = 90471137 is a prime.

It is a super-2 number, since 2×90471169² = 16370064840453122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90471109) 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, 91639 + ... + 92620.

It is an arithmetic number, because the mean of its divisors is an integer number (22663980).

Almost surely, 2^90471169 is an apocalyptic number.

It is an amenable number.

90471169 is a deficient number, since it is larger than the sum of its proper divisors (184751).

90471169 is a wasteful number, since it uses less digits than its factorization.

90471169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184750.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 90471169 is about 9511.6333507973. The cubic root of 90471169 is about 448.9211505662.

The spelling of 90471169 in words is "ninety million, four hundred seventy-one thousand, one hundred sixty-nine".