75428965 has 4 divisors (see below), whose sum is σ = 90514764. Its totient is φ = 60343168.

The previous prime is 75428939. The next prime is 75428987. The reversal of 75428965 is 56982457.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56982457 = 7 ⋅8140351.

It can be written as a sum of positive squares in 2 ways, for example, as 38862756 + 36566209 = 6234^2 + 6047^2 .

It is a cyclic number.

It is not a de Polignac number, because 75428965 - 2⁵ = 75428933 is a prime.

It is a super-3 number, since 3×75428965³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7542892 + ... + 7542901.

It is an arithmetic number, because the mean of its divisors is an integer number (22628691).

Almost surely, 2^75428965 is an apocalyptic number.

It is an amenable number.

75428965 is a deficient number, since it is larger than the sum of its proper divisors (15085799).

75428965 is a wasteful number, since it uses less digits than its factorization.

75428965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15085798.

The product of its digits is 604800, while the sum is 46.

The square root of 75428965 is about 8684.9850316509. The cubic root of 75428965 is about 422.5188115289.

The spelling of 75428965 in words is "seventy-five million, four hundred twenty-eight thousand, nine hundred sixty-five".