90871361 has 4 divisors (see below), whose sum is σ = 103852992. Its totient is φ = 77889732.

The previous prime is 90871343. The next prime is 90871369. The reversal of 90871361 is 16317809.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16317809 = 269 ⋅60661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90871361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90871369) 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, 6490805 + ... + 6490818.

It is an arithmetic number, because the mean of its divisors is an integer number (25963248).

Almost surely, 2^90871361 is an apocalyptic number.

It is an amenable number.

90871361 is a deficient number, since it is larger than the sum of its proper divisors (12981631).

90871361 is a wasteful number, since it uses less digits than its factorization.

90871361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12981630.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 90871361 is about 9532.6471139972. The cubic root of 90871361 is about 449.5820992718.

The spelling of 90871361 in words is "ninety million, eight hundred seventy-one thousand, three hundred sixty-one".