75450047 has 2 divisors, whose sum is σ = 75450048. Its totient is φ = 75450046.

The previous prime is 75450041. The next prime is 75450049. The reversal of 75450047 is 74005457.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75450047 is a prime.

Together with 75450049, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 75449995 and 75450022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75450041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37725023 + 37725024.

It is an arithmetic number, because the mean of its divisors is an integer number (37725024).

Almost surely, 2^75450047 is an apocalyptic number.

75450047 is a deficient number, since it is larger than the sum of its proper divisors (1).

75450047 is an equidigital number, since it uses as much as digits as its factorization.

75450047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 75450047 is about 8686.1986507332. The cubic root of 75450047 is about 422.5581717926.

The spelling of 75450047 in words is "seventy-five million, four hundred fifty thousand, forty-seven".