75408505 has 8 divisors (see below), whose sum is σ = 91974024. Its totient is φ = 59337600.

The previous prime is 75408457. The next prime is 75408517. The reversal of 75408505 is 50580457.

It can be written as a sum of positive squares in 4 ways, for example, as 8479744 + 66928761 = 2912^2 + 8181^2 .

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

It is not a de Polignac number, because 75408505 - 2⁹ = 75407993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123316 + ... + 123925.

It is an arithmetic number, because the mean of its divisors is an integer number (11496753).

Almost surely, 2^75408505 is an apocalyptic number.

It is an amenable number.

75408505 is a deficient number, since it is larger than the sum of its proper divisors (16565519).

75408505 is a wasteful number, since it uses less digits than its factorization.

75408505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247307.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 75408505 is about 8683.8070568156. The cubic root of 75408505 is about 422.4806055311.

The spelling of 75408505 in words is "seventy-five million, four hundred eight thousand, five hundred five".