75431738 has 4 divisors (see below), whose sum is σ = 113147610. Its totient is φ = 37715868.

The previous prime is 75431731. The next prime is 75431747. The reversal of 75431738 is 83713457.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83713457 = 17 ⋅4924321.

It can be written as a sum of positive squares in only one way, i.e., 75394489 + 37249 = 8683^2 + 193^2 .

It is not an unprimeable number, because it can be changed into a prime (75431731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18857933 + ... + 18857936.

Almost surely, 2^75431738 is an apocalyptic number.

75431738 is a deficient number, since it is larger than the sum of its proper divisors (37715872).

75431738 is a wasteful number, since it uses less digits than its factorization.

75431738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37715871.

The product of its digits is 70560, while the sum is 38.

The square root of 75431738 is about 8685.1446735216. The cubic root of 75431738 is about 422.5239891611.

The spelling of 75431738 in words is "seventy-five million, four hundred thirty-one thousand, seven hundred thirty-eight".