61916939 has 12 divisors (see below), whose sum is σ = 72744768. Its totient is φ = 52542000.

The previous prime is 61916927. The next prime is 61916963. The reversal of 61916939 is 93961916.

It is a happy number.

61916939 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 61916939 - 2⁴ = 61916923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61916939.

It is not an unprimeable number, because it can be changed into a prime (61916339) 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 11 ways as a sum of consecutive naturals, for example, 1307 + ... + 11204.

It is an arithmetic number, because the mean of its divisors is an integer number (6062064).

Almost surely, 2^61916939 is an apocalyptic number.

61916939 is a deficient number, since it is larger than the sum of its proper divisors (10827829).

61916939 is a wasteful number, since it uses less digits than its factorization.

61916939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12626 (or 12619 counting only the distinct ones).

The product of its digits is 78732, while the sum is 44.

The square root of 61916939 is about 7868.7317275403. The cubic root of 61916939 is about 395.6123365859.

The spelling of 61916939 in words is "sixty-one million, nine hundred sixteen thousand, nine hundred thirty-nine".