61170071 has 4 divisors (see below), whose sum is σ = 61221552. Its totient is φ = 61118592.

The previous prime is 61170061. The next prime is 61170091. The reversal of 61170071 is 17007116.

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

It is a cyclic number.

It is not a de Polignac number, because 61170071 - 2¹⁸ = 60907927 is a prime.

It is a super-2 number, since 2×61170071² = 7483555172290082, 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 (61170001) 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, 23915 + ... + 26348.

It is an arithmetic number, because the mean of its divisors is an integer number (15305388).

Almost surely, 2^61170071 is an apocalyptic number.

61170071 is a deficient number, since it is larger than the sum of its proper divisors (51481).

61170071 is a wasteful number, since it uses less digits than its factorization.

61170071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51480.

The product of its (nonzero) digits is 294, while the sum is 23.

The square root of 61170071 is about 7821.1297777239. The cubic root of 61170071 is about 394.0152171023.

Adding to 61170071 its reverse (17007116), we get a palindrome (78177187).

The spelling of 61170071 in words is "sixty-one million, one hundred seventy thousand, seventy-one".