90068381 has 6 divisors (see below), whose sum is σ = 97529850. Its totient is φ = 83139888.

The previous prime is 90068371. The next prime is 90068383. The reversal of 90068381 is 18386009.

It can be written as a sum of positive squares in 3 ways, for example, as 12716356 + 77352025 = 3566^2 + 8795^2 .

It is not a de Polignac number, because 90068381 - 2⁶ = 90068317 is a prime.

It is a super-2 number, since 2×90068381² = 16224626511922322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90068383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 266306 + ... + 266643.

It is an arithmetic number, because the mean of its divisors is an integer number (16254975).

Almost surely, 2^90068381 is an apocalyptic number.

It is an amenable number.

90068381 is a deficient number, since it is larger than the sum of its proper divisors (7461469).

90068381 is a wasteful number, since it uses less digits than its factorization.

90068381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532975 (or 532962 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 90068381 is about 9490.4362913409. The cubic root of 90068381 is about 448.2539433076.

The spelling of 90068381 in words is "ninety million, sixty-eight thousand, three hundred eighty-one".