75489989 has 8 divisors (see below), whose sum is σ = 76346712. Its totient is φ = 74636800.

The previous prime is 75489977. The next prime is 75490033. The reversal of 75489989 is 98998457.

It can be written as a sum of positive squares in 4 ways, for example, as 3833764 + 71656225 = 1958^2 + 8465^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75489989 - 2²⁰ = 74441413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75489919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78737 + ... + 79689.

It is an arithmetic number, because the mean of its divisors is an integer number (9543339).

Almost surely, 2^75489989 is an apocalyptic number.

It is an amenable number.

75489989 is a deficient number, since it is larger than the sum of its proper divisors (856723).

75489989 is a wasteful number, since it uses less digits than its factorization.

75489989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767.

The product of its digits is 6531840, while the sum is 59.

The square root of 75489989 is about 8688.4975110775. The cubic root of 75489989 is about 422.6327237280.

The spelling of 75489989 in words is "seventy-five million, four hundred eighty-nine thousand, nine hundred eighty-nine".