75389257 has 4 divisors (see below), whose sum is σ = 75627396. Its totient is φ = 75151120.

The previous prime is 75389243. The next prime is 75389263. The reversal of 75389257 is 75298357.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75298357 = 461 ⋅163337.

It can be written as a sum of positive squares in 2 ways, for example, as 5683456 + 69705801 = 2384^2 + 8349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75389257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75389287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118594 + ... + 119227.

It is an arithmetic number, because the mean of its divisors is an integer number (18906849).

Almost surely, 2^75389257 is an apocalyptic number.

It is an amenable number.

75389257 is a deficient number, since it is larger than the sum of its proper divisors (238139).

75389257 is a wasteful number, since it uses less digits than its factorization.

75389257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238138.

The product of its digits is 529200, while the sum is 46.

The square root of 75389257 is about 8682.6987164130. The cubic root of 75389257 is about 422.4446564531. Note that the first 3 decimals are identical.

The spelling of 75389257 in words is "seventy-five million, three hundred eighty-nine thousand, two hundred fifty-seven".