75447313 has 2 divisors, whose sum is σ = 75447314. Its totient is φ = 75447312.

The previous prime is 75447311. The next prime is 75447341. The reversal of 75447313 is 31374457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73564929 + 1882384 = 8577^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 75447313 - 2¹ = 75447311 is a prime.

Together with 75447311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75447311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37723656 + 37723657.

It is an arithmetic number, because the mean of its divisors is an integer number (37723657).

Almost surely, 2^75447313 is an apocalyptic number.

It is an amenable number.

75447313 is a deficient number, since it is larger than the sum of its proper divisors (1).

75447313 is an equidigital number, since it uses as much as digits as its factorization.

75447313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 34.

The square root of 75447313 is about 8686.0412732153. The cubic root of 75447313 is about 422.5530678064.

The spelling of 75447313 in words is "seventy-five million, four hundred forty-seven thousand, three hundred thirteen".