93281381 has 4 divisors (see below), whose sum is σ = 93310752. Its totient is φ = 93252012.

The previous prime is 93281359. The next prime is 93281401. The reversal of 93281381 is 18318239.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18318239 = 61 ⋅300299.

It is a cyclic number.

It is not a de Polignac number, because 93281381 - 2²² = 89087077 is a prime.

It is a super-2 number, since 2×93281381² = 17402832082534322, 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 (93281341) 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, 9251 + ... + 16496.

It is an arithmetic number, because the mean of its divisors is an integer number (23327688).

Almost surely, 2^93281381 is an apocalyptic number.

It is an amenable number.

93281381 is a deficient number, since it is larger than the sum of its proper divisors (29371).

93281381 is a wasteful number, since it uses less digits than its factorization.

93281381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29370.

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

The square root of 93281381 is about 9658.2286678252. The cubic root of 93281381 is about 453.5219615232.

The spelling of 93281381 in words is "ninety-three million, two hundred eighty-one thousand, three hundred eighty-one".