90011631 has 16 divisors (see below), whose sum is σ = 124878848. Its totient is φ = 57607200.

The previous prime is 90011609. The next prime is 90011659. The reversal of 90011631 is 13611009.

It is a happy number.

It is not a de Polignac number, because 90011631 - 2¹¹ = 90009583 is a prime.

It is a super-2 number, since 2×90011631² = 16204187430560322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90011598 and 90011607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90011671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8001 + ... + 15621.

It is an arithmetic number, because the mean of its divisors is an integer number (7804928).

Almost surely, 2^90011631 is an apocalyptic number.

90011631 is a deficient number, since it is larger than the sum of its proper divisors (34867217).

90011631 is a wasteful number, since it uses less digits than its factorization.

90011631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7782.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 90011631 is about 9487.4459682256. The cubic root of 90011631 is about 448.1597787199.

The spelling of 90011631 in words is "ninety million, eleven thousand, six hundred thirty-one".