75718381 has 4 divisors (see below), whose sum is σ = 75793564. Its totient is φ = 75643200.

The previous prime is 75718351. The next prime is 75718403. The reversal of 75718381 is 18381757.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47734281 + 27984100 = 6909^2 + 5290^2 .

It is a cyclic number.

It is not a de Polignac number, because 75718381 - 2¹³ = 75710189 is a prime.

It is a super-2 number, since 2×75718381² = 11466546442522322, 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 (75718351) 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, 36060 + ... + 38101.

It is an arithmetic number, because the mean of its divisors is an integer number (18948391).

Almost surely, 2^75718381 is an apocalyptic number.

It is an amenable number.

75718381 is a deficient number, since it is larger than the sum of its proper divisors (75183).

75718381 is a wasteful number, since it uses less digits than its factorization.

75718381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75182.

The product of its digits is 47040, while the sum is 40.

The square root of 75718381 is about 8701.6309390826. The cubic root of 75718381 is about 423.0585141869.

The spelling of 75718381 in words is "seventy-five million, seven hundred eighteen thousand, three hundred eighty-one".