90035981 has 12 divisors (see below), whose sum is σ = 108349020. Its totient is φ = 74511360.

The previous prime is 90035963. The next prime is 90035983. The reversal of 90035981 is 18953009.

It can be written as a sum of positive squares in 2 ways, for example, as 44689225 + 45346756 = 6685^2 + 6734^2 .

It is not a de Polignac number, because 90035981 - 2⁶ = 90035917 is a prime.

It is a super-2 number, since 2×90035981² = 16212955749264722, 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 (90035983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30260 + ... + 33101.

It is an arithmetic number, because the mean of its divisors is an integer number (9029085).

Almost surely, 2^90035981 is an apocalyptic number.

It is an amenable number.

90035981 is a deficient number, since it is larger than the sum of its proper divisors (18313039).

90035981 is a wasteful number, since it uses less digits than its factorization.

90035981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63404 (or 63397 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 90035981 is about 9488.7291562148. The cubic root of 90035981 is about 448.2001872264.

The spelling of 90035981 in words is "ninety million, thirty-five thousand, nine hundred eighty-one".