90180681 has 8 divisors (see below), whose sum is σ = 120333504. Its totient is φ = 60074160.

The previous prime is 90180679. The next prime is 90180683. The reversal of 90180681 is 18608109.

It is an interprime number because it is at equal distance from previous prime (90180679) and next prime (90180683).

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

It is not a de Polignac number, because 90180681 - 2¹ = 90180679 is a prime.

It is a super-2 number, since 2×90180681² = 16265110451247522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90180683) 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, 6741 + ... + 15026.

It is an arithmetic number, because the mean of its divisors is an integer number (15041688).

Almost surely, 2^90180681 is an apocalyptic number.

It is an amenable number.

90180681 is a deficient number, since it is larger than the sum of its proper divisors (30152823).

90180681 is a wasteful number, since it uses less digits than its factorization.

90180681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23151.

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 90180681 is about 9496.3509307523. The cubic root of 90180681 is about 448.4401648221.

The spelling of 90180681 in words is "ninety million, one hundred eighty thousand, six hundred eighty-one".