71171090 has 8 divisors (see below), whose sum is σ = 128107980. Its totient is φ = 28468432.

The previous prime is 71171081. The next prime is 71171099. The reversal of 71171090 is 9017117.

It is an interprime number because it is at equal distance from previous prime (71171081) and next prime (71171099).

It can be written as a sum of positive squares in 2 ways, for example, as 65885689 + 5285401 = 8117^2 + 2299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (71171099) 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, 3558545 + ... + 3558564.

Almost surely, 2^71171090 is an apocalyptic number.

71171090 is a deficient number, since it is larger than the sum of its proper divisors (56936890).

71171090 is a wasteful number, since it uses less digits than its factorization.

71171090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7117116.

The product of its (nonzero) digits is 441, while the sum is 26.

The square root of 71171090 is about 8436.2959881692. The cubic root of 71171090 is about 414.4141149481.

The spelling of 71171090 in words is "seventy-one million, one hundred seventy-one thousand, ninety".