75530513 has 2 divisors, whose sum is σ = 75530514. Its totient is φ = 75530512.

The previous prime is 75530503. The next prime is 75530563. The reversal of 75530513 is 31503557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61340224 + 14190289 = 7832^2 + 3767^2 .

It is an emirp because it is prime and its reverse (31503557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75530513 - 2¹² = 75526417 is a prime.

It is not a weakly prime, because it can be changed into another prime (75530503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37765256 + 37765257.

It is an arithmetic number, because the mean of its divisors is an integer number (37765257).

Almost surely, 2^75530513 is an apocalyptic number.

It is an amenable number.

75530513 is a deficient number, since it is larger than the sum of its proper divisors (1).

75530513 is an equidigital number, since it uses as much as digits as its factorization.

75530513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7875, while the sum is 29.

The square root of 75530513 is about 8690.8292469706. The cubic root of 75530513 is about 422.7083350994.

The spelling of 75530513 in words is "seventy-five million, five hundred thirty thousand, five hundred thirteen".