61995671 has 4 divisors (see below), whose sum is σ = 62025600. Its totient is φ = 61965744.

The previous prime is 61995667. The next prime is 61995677. The reversal of 61995671 is 17659916.

It is a happy number.

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 61995671 - 2² = 61995667 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 (61995677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11606 + ... + 16083.

It is an arithmetic number, because the mean of its divisors is an integer number (15506400).

Almost surely, 2^61995671 is an apocalyptic number.

61995671 is a deficient number, since it is larger than the sum of its proper divisors (29929).

61995671 is a wasteful number, since it uses less digits than its factorization.

61995671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29928.

The product of its digits is 102060, while the sum is 44.

The square root of 61995671 is about 7873.7329774383. The cubic root of 61995671 is about 395.7799490801.

The spelling of 61995671 in words is "sixty-one million, nine hundred ninety-five thousand, six hundred seventy-one".