90897311 has 8 divisors (see below), whose sum is σ = 99841920. Its totient is φ = 82368792.

The previous prime is 90897299. The next prime is 90897361. The reversal of 90897311 is 11379809.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90897311 is a prime.

It is a super-2 number, since 2×90897311² = 16524642294061442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90897361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103565 + ... + 104438.

It is an arithmetic number, because the mean of its divisors is an integer number (12480240).

Almost surely, 2^90897311 is an apocalyptic number.

90897311 is a deficient number, since it is larger than the sum of its proper divisors (8944609).

90897311 is a wasteful number, since it uses less digits than its factorization.

90897311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208045.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 90897311 is about 9534.0081287987. The cubic root of 90897311 is about 449.6248906969.

The spelling of 90897311 in words is "ninety million, eight hundred ninety-seven thousand, three hundred eleven".