75400509 has 16 divisors (see below), whose sum is σ = 106389504. Its totient is φ = 47401200.

The previous prime is 75400499. The next prime is 75400513. The reversal of 75400509 is 90500457.

It is not a de Polignac number, because 75400509 - 2⁹ = 75399997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75400519) 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, 2797 + ... + 12594.

It is an arithmetic number, because the mean of its divisors is an integer number (6649344).

Almost surely, 2^75400509 is an apocalyptic number.

It is an amenable number.

75400509 is a deficient number, since it is larger than the sum of its proper divisors (30988995).

75400509 is a wasteful number, since it uses less digits than its factorization.

75400509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15488.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 75400509 is about 8683.3466474626. The cubic root of 75400509 is about 422.4656723157.

The spelling of 75400509 in words is "seventy-five million, four hundred thousand, five hundred nine".