75489381 has 64 divisors (see below), whose sum is σ = 130775040. Its totient is φ = 42577920.

The previous prime is 75489353. The next prime is 75489389. The reversal of 75489381 is 18398457.

It is not a de Polignac number, because 75489381 - 2⁶ = 75489317 is a prime.

It is a super-2 number, since 2×75489381² = 11397293287526322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75489389) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 293605 + ... + 293861.

It is an arithmetic number, because the mean of its divisors is an integer number (2043360).

Almost surely, 2^75489381 is an apocalyptic number.

It is an amenable number.

75489381 is a deficient number, since it is larger than the sum of its proper divisors (55285659).

75489381 is a wasteful number, since it uses less digits than its factorization.

75489381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 75489381 is about 8688.4625222188. The cubic root of 75489381 is about 422.6315890902.

The spelling of 75489381 in words is "seventy-five million, four hundred eighty-nine thousand, three hundred eighty-one".