75144487 has 16 divisors (see below), whose sum is σ = 86688000. Its totient is φ = 64419840.

The previous prime is 75144479. The next prime is 75144529. The reversal of 75144487 is 78444157.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 75144487 - 2³ = 75144479 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 (75144457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53014 + ... + 54412.

It is an arithmetic number, because the mean of its divisors is an integer number (5418000).

Almost surely, 2^75144487 is an apocalyptic number.

75144487 is a deficient number, since it is larger than the sum of its proper divisors (11543513).

75144487 is a wasteful number, since it uses less digits than its factorization.

75144487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1686.

The product of its digits is 125440, while the sum is 40.

The square root of 75144487 is about 8668.5919848612. The cubic root of 75144487 is about 421.9869701659.

The spelling of 75144487 in words is "seventy-five million, one hundred forty-four thousand, four hundred eighty-seven".