75464681 has 2 divisors, whose sum is σ = 75464682. Its totient is φ = 75464680.

The previous prime is 75464659. The next prime is 75464687. The reversal of 75464681 is 18646457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 22174681 = 7300^2 + 4709^2 .

It is an emirp because it is prime and its reverse (18646457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75464681 - 2⁶ = 75464617 is a prime.

It is a super-2 number, since 2×75464681² = 11389836156863522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75464687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37732340 + 37732341.

It is an arithmetic number, because the mean of its divisors is an integer number (37732341).

Almost surely, 2^75464681 is an apocalyptic number.

It is an amenable number.

75464681 is a deficient number, since it is larger than the sum of its proper divisors (1).

75464681 is an equidigital number, since it uses as much as digits as its factorization.

75464681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 75464681 is about 8687.0409806792. The cubic root of 75464681 is about 422.5854892774.

The spelling of 75464681 in words is "seventy-five million, four hundred sixty-four thousand, six hundred eighty-one".