61972871 has 6 divisors (see below), whose sum is σ = 65833080. Its totient is φ = 58327136.

The previous prime is 61972849. The next prime is 61972873. The reversal of 61972871 is 17827916.

61972871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-61972871 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 (61972873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106931 + ... + 107508.

It is an arithmetic number, because the mean of its divisors is an integer number (10972180).

Almost surely, 2^61972871 is an apocalyptic number.

61972871 is a deficient number, since it is larger than the sum of its proper divisors (3860209).

61972871 is a wasteful number, since it uses less digits than its factorization.

61972871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214473 (or 214456 counting only the distinct ones).

The product of its digits is 42336, while the sum is 41.

The square root of 61972871 is about 7872.2849923005. The cubic root of 61972871 is about 395.7314247819.

The spelling of 61972871 in words is "sixty-one million, nine hundred seventy-two thousand, eight hundred seventy-one".