75420547 has 2 divisors, whose sum is σ = 75420548. Its totient is φ = 75420546.

The previous prime is 75420533. The next prime is 75420593. The reversal of 75420547 is 74502457.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75420547 is a prime.

It is not a weakly prime, because it can be changed into another prime (75420047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37710273 + 37710274.

It is an arithmetic number, because the mean of its divisors is an integer number (37710274).

Almost surely, 2^75420547 is an apocalyptic number.

75420547 is a deficient number, since it is larger than the sum of its proper divisors (1).

75420547 is an equidigital number, since it uses as much as digits as its factorization.

75420547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 75420547 is about 8684.5003886234. The cubic root of 75420547 is about 422.5030930063.

The spelling of 75420547 in words is "seventy-five million, four hundred twenty thousand, five hundred forty-seven".