75307685 has 4 divisors (see below), whose sum is σ = 90369228. Its totient is φ = 60246144.

The previous prime is 75307669. The next prime is 75307703. The reversal of 75307685 is 58670357.

It is a Cunningham number, because it is equal to 8678²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58670357 = 1669 ⋅35153.

It can be written as a sum of positive squares in 2 ways, for example, as 27102436 + 48205249 = 5206^2 + 6943^2 .

It is a cyclic number.

It is not a de Polignac number, because 75307685 - 2⁴ = 75307669 is a prime.

It is a Duffinian number.

It is a Curzon 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, 7530764 + ... + 7530773.

It is an arithmetic number, because the mean of its divisors is an integer number (22592307).

Almost surely, 2^75307685 is an apocalyptic number.

It is an amenable number.

75307685 is a deficient number, since it is larger than the sum of its proper divisors (15061543).

75307685 is a wasteful number, since it uses less digits than its factorization.

75307685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15061542.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 75307685 is about 8678.0000576170. Note that the first 4 decimals coincide. The cubic root of 75307685 is about 422.2922382221.

The spelling of 75307685 in words is "seventy-five million, three hundred seven thousand, six hundred eighty-five".