90869161 has 4 divisors (see below), whose sum is σ = 93085524. Its totient is φ = 88652800.

The previous prime is 90869143. The next prime is 90869179. The reversal of 90869161 is 16196809.

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

It is an interprime number because it is at equal distance from previous prime (90869143) and next prime (90869179).

It can be written as a sum of positive squares in 2 ways, for example, as 45643536 + 45225625 = 6756^2 + 6725^2 .

It is a cyclic number.

It is not a de Polignac number, because 90869161 - 2⁷ = 90869033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90869111) 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, 1108120 + ... + 1108201.

It is an arithmetic number, because the mean of its divisors is an integer number (23271381).

Almost surely, 2^90869161 is an apocalyptic number.

It is an amenable number.

90869161 is a deficient number, since it is larger than the sum of its proper divisors (2216363).

90869161 is a wasteful number, since it uses less digits than its factorization.

90869161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216362.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 90869161 is about 9532.5317203773. The cubic root of 90869161 is about 449.5784711078.

The spelling of 90869161 in words is "ninety million, eight hundred sixty-nine thousand, one hundred sixty-one".