75387945 has 32 divisors (see below), whose sum is σ = 128373120. Its totient is φ = 37647360.

The previous prime is 75387943. The next prime is 75387959. The reversal of 75387945 is 54978357.

It is not a de Polignac number, because 75387945 - 2¹ = 75387943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75387894 and 75387903.

It is not an unprimeable number, because it can be changed into a prime (75387941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57750 + ... + 59040.

It is an arithmetic number, because the mean of its divisors is an integer number (4011660).

Almost surely, 2^75387945 is an apocalyptic number.

It is an amenable number.

75387945 is a deficient number, since it is larger than the sum of its proper divisors (52985175).

75387945 is a wasteful number, since it uses less digits than its factorization.

75387945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its digits is 1058400, while the sum is 48.

The square root of 75387945 is about 8682.6231635376. The cubic root of 75387945 is about 422.4422058360.

The spelling of 75387945 in words is "seventy-five million, three hundred eighty-seven thousand, nine hundred forty-five".