71613607 has 4 divisors (see below), whose sum is σ = 77122360. Its totient is φ = 66104856.

The previous prime is 71613601. The next prime is 71613613. The reversal of 71613607 is 70631617.

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

It is an interprime number because it is at equal distance from previous prime (71613601) and next prime (71613613).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71613607 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 (71613601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2754357 + ... + 2754382.

It is an arithmetic number, because the mean of its divisors is an integer number (19280590).

Almost surely, 2^71613607 is an apocalyptic number.

71613607 is a deficient number, since it is larger than the sum of its proper divisors (5508753).

71613607 is a wasteful number, since it uses less digits than its factorization.

71613607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5508752.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 71613607 is about 8462.4823190362. The cubic root of 71613607 is about 415.2712350845.

The spelling of 71613607 in words is "seventy-one million, six hundred thirteen thousand, six hundred seven".