61309171 has 16 divisors (see below), whose sum is σ = 76958208. Its totient is φ = 47448000.

The previous prime is 61309159. The next prime is 61309177. The reversal of 61309171 is 17190316.

It is a cyclic number.

It is not a de Polignac number, because 61309171 - 2⁷ = 61309043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61309177) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8991 + ... + 14263.

It is an arithmetic number, because the mean of its divisors is an integer number (4809888).

Almost surely, 2^61309171 is an apocalyptic number.

61309171 is a deficient number, since it is larger than the sum of its proper divisors (15649037).

61309171 is a wasteful number, since it uses less digits than its factorization.

61309171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 61309171 is about 7830.0173052171. The cubic root of 61309171 is about 394.3136529459.

Adding to 61309171 its reverse (17190316), we get a palindrome (78499487).

The spelling of 61309171 in words is "sixty-one million, three hundred nine thousand, one hundred seventy-one".