93870090 has 120 divisors (see below), whose sum is σ = 268795692. Its totient is φ = 23500800.

The previous prime is 93870083. The next prime is 93870097. The reversal of 93870090 is 9007839.

It is an interprime number because it is at equal distance from previous prime (93870083) and next prime (93870097).

It can be written as a sum of positive squares in 6 ways, for example, as 89472681 + 4397409 = 9459^2 + 2097^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93870097) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 233890 + ... + 234290.

Almost surely, 2^93870090 is an apocalyptic number.

93870090 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 93870090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134397846).

93870090 is an abundant number, since it is smaller than the sum of its proper divisors (174925602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

93870090 is a wasteful number, since it uses less digits than its factorization.

93870090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 93870090 is about 9688.6578017804. The cubic root of 93870090 is about 454.4740370099.

The spelling of 93870090 in words is "ninety-three million, eight hundred seventy thousand, ninety".