71608157 has 4 divisors (see below), whose sum is σ = 71630460. Its totient is φ = 71585856.

The previous prime is 71608151. The next prime is 71608183. The reversal of 71608157 is 75180617.

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 35295481 + 36312676 = 5941^2 + 6026^2 .

It is a cyclic number.

It is not a de Polignac number, because 71608157 - 2¹² = 71604061 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 (71608151) 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, 5318 + ... + 13095.

It is an arithmetic number, because the mean of its divisors is an integer number (17907615).

Almost surely, 2^71608157 is an apocalyptic number.

It is an amenable number.

71608157 is a deficient number, since it is larger than the sum of its proper divisors (22303).

71608157 is a wasteful number, since it uses less digits than its factorization.

71608157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22302.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 71608157 is about 8462.1603033741. The cubic root of 71608157 is about 415.2607003750.

The spelling of 71608157 in words is "seventy-one million, six hundred eight thousand, one hundred fifty-seven".