90820930 has 8 divisors (see below), whose sum is σ = 163477692. Its totient is φ = 36328368.

The previous prime is 90820927. The next prime is 90820937. The reversal of 90820930 is 3902809.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 90497169 + 323761 = 9513^2 + 569^2 .

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

It is a super-3 number, since 3×90820930³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90820892 and 90820901.

It is not an unprimeable number, because it can be changed into a prime (90820937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4541037 + ... + 4541056.

Almost surely, 2^90820930 is an apocalyptic number.

90820930 is a deficient number, since it is larger than the sum of its proper divisors (72656762).

90820930 is a wasteful number, since it uses less digits than its factorization.

90820930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9082100.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 90820930 is about 9530.0015739768. The cubic root of 90820930 is about 449.4989154899.

The spelling of 90820930 in words is "ninety million, eight hundred twenty thousand, nine hundred thirty".