61871407 has 6 divisors (see below), whose sum is σ = 66997032. Its totient is φ = 57111912.

The previous prime is 61871399. The next prime is 61871417. The reversal of 61871407 is 70417816.

61871407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61871407 - 2³ = 61871399 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 (61871417) 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, 182883 + ... + 183220.

It is an arithmetic number, because the mean of its divisors is an integer number (11166172).

Almost surely, 2^61871407 is an apocalyptic number.

61871407 is a deficient number, since it is larger than the sum of its proper divisors (5125625).

61871407 is a wasteful number, since it uses less digits than its factorization.

61871407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366129 (or 366116 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 61871407 is about 7865.8379718883. The cubic root of 61871407 is about 395.5153386914.

The spelling of 61871407 in words is "sixty-one million, eight hundred seventy-one thousand, four hundred seven".