75505613 has 4 divisors (see below), whose sum is σ = 75527040. Its totient is φ = 75484188.

The previous prime is 75505607. The next prime is 75505621. The reversal of 75505613 is 31650557.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75505613 - 2¹⁰ = 75504589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75505613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75505603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4043 + ... + 12936.

It is an arithmetic number, because the mean of its divisors is an integer number (18881760).

Almost surely, 2^75505613 is an apocalyptic number.

It is an amenable number.

75505613 is a deficient number, since it is larger than the sum of its proper divisors (21427).

75505613 is a wasteful number, since it uses less digits than its factorization.

75505613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21426.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 75505613 is about 8689.3965843435. The cubic root of 75505613 is about 422.6618788441.

The spelling of 75505613 in words is "seventy-five million, five hundred five thousand, six hundred thirteen".