90869281 has 8 divisors (see below), whose sum is σ = 91520384. Its totient is φ = 90221040.

The previous prime is 90869269. The next prime is 90869287. The reversal of 90869281 is 18296809.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90869281 - 2⁵ = 90869249 is a prime.

It is a super-2 number, since 2×90869281² = 16514452458913922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90869287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147931 + ... + 148543.

It is an arithmetic number, because the mean of its divisors is an integer number (11440048).

Almost surely, 2^90869281 is an apocalyptic number.

It is an amenable number.

90869281 is a deficient number, since it is larger than the sum of its proper divisors (651103).

90869281 is a wasteful number, since it uses less digits than its factorization.

90869281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 90869281 is about 9532.5380146108. The cubic root of 90869281 is about 449.5786690092.

The spelling of 90869281 in words is "ninety million, eight hundred sixty-nine thousand, two hundred eighty-one".