61917812 has 12 divisors (see below), whose sum is σ = 118206816. Its totient is φ = 28144440.

The previous prime is 61917803. The next prime is 61917829. The reversal of 61917812 is 21871916.

61917812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 703568 + ... + 703655.

It is an arithmetic number, because the mean of its divisors is an integer number (9850568).

Almost surely, 2^61917812 is an apocalyptic number.

It is an amenable number.

61917812 is a deficient number, since it is larger than the sum of its proper divisors (56289004).

61917812 is a wasteful number, since it uses less digits than its factorization.

61917812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407238 (or 1407236 counting only the distinct ones).

The product of its digits is 6048, while the sum is 35.

The square root of 61917812 is about 7868.7872000709. The cubic root of 61917812 is about 395.6141958937.

The spelling of 61917812 in words is "sixty-one million, nine hundred seventeen thousand, eight hundred twelve".