75345047 has 4 divisors (see below), whose sum is σ = 75586080. Its totient is φ = 75104016.

The previous prime is 75345007. The next prime is 75345059. The reversal of 75345047 is 74054357.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74054357 = 13 ⋅5696489.

It is a cyclic number.

It is not a de Polignac number, because 75345047 - 2¹⁰ = 75344023 is a prime.

It is a super-2 number, since 2×75345047² = 11353752214864418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75344998 and 75345016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75345007) 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, 120047 + ... + 120672.

It is an arithmetic number, because the mean of its divisors is an integer number (18896520).

Almost surely, 2^75345047 is an apocalyptic number.

75345047 is a deficient number, since it is larger than the sum of its proper divisors (241033).

75345047 is a wasteful number, since it uses less digits than its factorization.

75345047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241032.

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 75345047 is about 8680.1524756193. The cubic root of 75345047 is about 422.3620632078.

The spelling of 75345047 in words is "seventy-five million, three hundred forty-five thousand, forty-seven".