75497813 has 4 divisors (see below), whose sum is σ = 75610668. Its totient is φ = 75384960.

The previous prime is 75497801. The next prime is 75497819. The reversal of 75497813 is 31879457.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54493924 + 21003889 = 7382^2 + 4583^2 .

It is a cyclic number.

It is not a de Polignac number, because 75497813 - 2⁶ = 75497749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75497819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55418 + ... + 56763.

It is an arithmetic number, because the mean of its divisors is an integer number (18902667).

Almost surely, 2^75497813 is an apocalyptic number.

It is an amenable number.

75497813 is a deficient number, since it is larger than the sum of its proper divisors (112855).

75497813 is a wasteful number, since it uses less digits than its factorization.

75497813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112854.

The product of its digits is 211680, while the sum is 44.

The square root of 75497813 is about 8688.9477498717. The cubic root of 75497813 is about 422.6473241814.

The spelling of 75497813 in words is "seventy-five million, four hundred ninety-seven thousand, eight hundred thirteen".