75028769 has 4 divisors (see below), whose sum is σ = 79442244. Its totient is φ = 70615296.

The previous prime is 75028747. The next prime is 75028781. The reversal of 75028769 is 96782057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96782057 = 307 ⋅315251.

It can be written as a sum of positive squares in 2 ways, for example, as 42081169 + 32947600 = 6487^2 + 5740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75028769 is a prime.

It is a super-2 number, since 2×75028769² = 11258632355310722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75028799) 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, 2206712 + ... + 2206745.

It is an arithmetic number, because the mean of its divisors is an integer number (19860561).

Almost surely, 2^75028769 is an apocalyptic number.

It is an amenable number.

75028769 is a deficient number, since it is larger than the sum of its proper divisors (4413475).

75028769 is a wasteful number, since it uses less digits than its factorization.

75028769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413474.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 75028769 is about 8661.9148575820. The cubic root of 75028769 is about 421.7702473452.

The spelling of 75028769 in words is "seventy-five million, twenty-eight thousand, seven hundred sixty-nine".