75378447 has 6 divisors (see below), whose sum is σ = 108879992. Its totient is φ = 50252292.

The previous prime is 75378439. The next prime is 75378467. The reversal of 75378447 is 74487357.

It is not a de Polignac number, because 75378447 - 2³ = 75378439 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 (75378467) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4187683 + ... + 4187700.

Almost surely, 2^75378447 is an apocalyptic number.

75378447 is a deficient number, since it is larger than the sum of its proper divisors (33501545).

75378447 is a wasteful number, since it uses less digits than its factorization.

75378447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8375389 (or 8375386 counting only the distinct ones).

The product of its digits is 658560, while the sum is 45.

The square root of 75378447 is about 8682.0761917873. The cubic root of 75378447 is about 422.4244641640.

The spelling of 75378447 in words is "seventy-five million, three hundred seventy-eight thousand, four hundred forty-seven".