90831611 has 4 divisors (see below), whose sum is σ = 97818672. Its totient is φ = 83844552.

The previous prime is 90831607. The next prime is 90831617. The reversal of 90831611 is 11613809.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11613809 = 31 ⋅374639.

It is a cyclic number.

It is not a de Polignac number, because 90831611 - 2² = 90831607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90831617) 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 3 ways as a sum of consecutive naturals, for example, 3493511 + ... + 3493536.

It is an arithmetic number, because the mean of its divisors is an integer number (24454668).

Almost surely, 2^90831611 is an apocalyptic number.

90831611 is a deficient number, since it is larger than the sum of its proper divisors (6987061).

90831611 is a wasteful number, since it uses less digits than its factorization.

90831611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6987060.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 90831611 is about 9530.5619456567. The cubic root of 90831611 is about 449.5165359133.

The spelling of 90831611 in words is "ninety million, eight hundred thirty-one thousand, six hundred eleven".