75240047 has 2 divisors, whose sum is σ = 75240048. Its totient is φ = 75240046.

The previous prime is 75240037. The next prime is 75240059. The reversal of 75240047 is 74004257.

It is a weak prime.

It is an emirp because it is prime and its reverse (74004257) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75240047 - 2¹⁴ = 75223663 is a prime.

It is a super-2 number, since 2×75240047² = 11322129345124418, which contains 22 as substring.

It is equal to p_4407590 and since 75240047 and 4407590 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75240037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37620023 + 37620024.

It is an arithmetic number, because the mean of its divisors is an integer number (37620024).

Almost surely, 2^75240047 is an apocalyptic number.

75240047 is a deficient number, since it is larger than the sum of its proper divisors (1).

75240047 is an equidigital number, since it uses as much as digits as its factorization.

75240047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 75240047 is about 8674.1020860951. The cubic root of 75240047 is about 422.1657723418.

The spelling of 75240047 in words is "seventy-five million, two hundred forty thousand, forty-seven".