75394489 has 9 divisors (see below), whose sum is σ = 79745967. Its totient is φ = 71270064.

The previous prime is 75394471. The next prime is 75394499. The reversal of 75394489 is 98449357.

The square root of 75394489 is 8683.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 65205625 + 10188864 = 8075^2 + 3192^2 .

It is not a de Polignac number, because 75394489 - 2¹¹ = 75392441 is a prime.

It is a super-2 number, since 2×75394489² = 11368657943142242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75394469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 164749 + ... + 165205.

It is an arithmetic number, because the mean of its divisors is an integer number (8860663).

Almost surely, 2^75394489 is an apocalyptic number.

75394489 is the 8683-rd square number.

75394489 is the 4342-nd centered octagonal number.

It is an amenable number.

75394489 is a deficient number, since it is larger than the sum of its proper divisors (4351478).

75394489 is an frugal number, since it uses more digits than its factorization.

75394489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952 (or 476 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The cubic root of 75394489 is about 422.4544287531.

Multiplying 75394489 by its sum of digits (49), we get a square (3694329961 = 60781²).

The spelling of 75394489 in words is "seventy-five million, three hundred ninety-four thousand, four hundred eighty-nine".