75481613 has 2 divisors, whose sum is σ = 75481614. Its totient is φ = 75481612.

The previous prime is 75481603. The next prime is 75481619. The reversal of 75481613 is 31618457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74684164 + 797449 = 8642^2 + 893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75481613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75481619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37740806 + 37740807.

It is an arithmetic number, because the mean of its divisors is an integer number (37740807).

Almost surely, 2^75481613 is an apocalyptic number.

It is an amenable number.

75481613 is a deficient number, since it is larger than the sum of its proper divisors (1).

75481613 is an equidigital number, since it uses as much as digits as its factorization.

75481613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 75481613 is about 8688.0154811096. The cubic root of 75481613 is about 422.6170920631.

The spelling of 75481613 in words is "seventy-five million, four hundred eighty-one thousand, six hundred thirteen".