75506747 has 4 divisors (see below), whose sum is σ = 76541160. Its totient is φ = 74472336.

The previous prime is 75506719. The next prime is 75506759. The reversal of 75506747 is 74760557.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74760557 = 23 ⋅3250459.

It is a cyclic number.

It is not a de Polignac number, because 75506747 - 2⁸ = 75506491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75506777) 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, 517097 + ... + 517242.

It is an arithmetic number, because the mean of its divisors is an integer number (19135290).

Almost surely, 2^75506747 is an apocalyptic number.

75506747 is a deficient number, since it is larger than the sum of its proper divisors (1034413).

75506747 is a wasteful number, since it uses less digits than its factorization.

75506747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034412.

The product of its (nonzero) digits is 205800, while the sum is 41.

The square root of 75506747 is about 8689.4618360403. The cubic root of 75506747 is about 422.6639947846.

The spelling of 75506747 in words is "seventy-five million, five hundred six thousand, seven hundred forty-seven".