75378709 has 8 divisors (see below), whose sum is σ = 87905600. Its totient is φ = 64610028.

The previous prime is 75378707. The next prime is 75378713. The reversal of 75378709 is 90787357.

It is a happy number.

It is not a de Polignac number, because 75378709 - 2¹ = 75378707 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 (75378707) 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, 109539 + ... + 110224.

It is an arithmetic number, because the mean of its divisors is an integer number (10988200).

Almost surely, 2^75378709 is an apocalyptic number.

It is an amenable number.

75378709 is a deficient number, since it is larger than the sum of its proper divisors (12526891).

75378709 is an equidigital number, since it uses as much as digits as its factorization.

75378709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219784 (or 219770 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 75378709 is about 8682.0912803310. The cubic root of 75378709 is about 422.4249535836.

The spelling of 75378709 in words is "seventy-five million, three hundred seventy-eight thousand, seven hundred nine".