61687122 has 16 divisors (see below), whose sum is σ = 140999232. Its totient is φ = 17624880.

The previous prime is 61687121. The next prime is 61687123. The reversal of 61687122 is 22178616.

61687122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61687121) and next prime (61687123).

It is not an unprimeable number, because it can be changed into a prime (61687121) 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 7 ways as a sum of consecutive naturals, for example, 734329 + ... + 734412.

It is an arithmetic number, because the mean of its divisors is an integer number (8812452).

Almost surely, 2^61687122 is an apocalyptic number.

61687122 is an abundant number, since it is smaller than the sum of its proper divisors (79312110).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61687122 is a wasteful number, since it uses less digits than its factorization.

61687122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468753.

The product of its digits is 8064, while the sum is 33.

The square root of 61687122 is about 7854.1149724205. The cubic root of 61687122 is about 395.1222652008.

The spelling of 61687122 in words is "sixty-one million, six hundred eighty-seven thousand, one hundred twenty-two".