73563613 has 4 divisors (see below), whose sum is σ = 73647808. Its totient is φ = 73479420.

The previous prime is 73563599. The next prime is 73563631. The reversal of 73563613 is 31636537.

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 73563613 - 2⁹ = 73563101 is a prime.

It is a super-2 number, since 2×73563613² = 10823210315227538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73563013) 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, 40773 + ... + 42538.

It is an arithmetic number, because the mean of its divisors is an integer number (18411952).

Almost surely, 2^73563613 is an apocalyptic number.

It is an amenable number.

73563613 is a deficient number, since it is larger than the sum of its proper divisors (84195).

73563613 is an equidigital number, since it uses as much as digits as its factorization.

73563613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84194.

The product of its digits is 34020, while the sum is 34.

The square root of 73563613 is about 8576.9232828562. The cubic root of 73563613 is about 419.0067477833.

The spelling of 73563613 in words is "seventy-three million, five hundred sixty-three thousand, six hundred thirteen".