61961171 has 4 divisors (see below), whose sum is σ = 62039712. Its totient is φ = 61882632.

The previous prime is 61961153. The next prime is 61961173. The reversal of 61961171 is 17116916.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61961171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61961173) 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, 38075 + ... + 39668.

It is an arithmetic number, because the mean of its divisors is an integer number (15509928).

Almost surely, 2^61961171 is an apocalyptic number.

61961171 is a deficient number, since it is larger than the sum of its proper divisors (78541).

61961171 is an equidigital number, since it uses as much as digits as its factorization.

61961171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78540.

The product of its digits is 2268, while the sum is 32.

The square root of 61961171 is about 7871.5418438829. The cubic root of 61961171 is about 395.7065195344.

The spelling of 61961171 in words is "sixty-one million, nine hundred sixty-one thousand, one hundred seventy-one".