75090909 has 8 divisors (see below), whose sum is σ = 100910080. Its totient is φ = 49666176.

The previous prime is 75090881. The next prime is 75090923. The reversal of 75090909 is 90909057.

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

It is not a de Polignac number, because 75090909 - 2⁹ = 75090397 is a prime.

It is a super-2 number, since 2×75090909² = 11277289228892562, which contains 22 as substring.

It is a Duffinian number.

75090909 is a modest number, since divided by 90909 gives 75 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75090979) 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 7 ways as a sum of consecutive naturals, for example, 98164 + ... + 98925.

It is an arithmetic number, because the mean of its divisors is an integer number (12613760).

Almost surely, 2^75090909 is an apocalyptic number.

It is an amenable number.

75090909 is a deficient number, since it is larger than the sum of its proper divisors (25819171).

75090909 is a wasteful number, since it uses less digits than its factorization.

75090909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197219.

The product of its (nonzero) digits is 25515, while the sum is 39.

The square root of 75090909 is about 8665.5010818763. The cubic root of 75090909 is about 421.8866541198.

The spelling of 75090909 in words is "seventy-five million, ninety thousand, nine hundred nine".