61881923 has 4 divisors (see below), whose sum is σ = 61898520. Its totient is φ = 61865328.

The previous prime is 61881901. The next prime is 61881931. The reversal of 61881923 is 32918816.

61881923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61881923 - 2²⁴ = 45104707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61881943) 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 3 ways as a sum of consecutive naturals, for example, 188 + ... + 11126.

It is an arithmetic number, because the mean of its divisors is an integer number (15474630).

Almost surely, 2^61881923 is an apocalyptic number.

61881923 is a deficient number, since it is larger than the sum of its proper divisors (16597).

61881923 is a wasteful number, since it uses less digits than its factorization.

61881923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16596.

The product of its digits is 20736, while the sum is 38.

The square root of 61881923 is about 7866.5064037348. The cubic root of 61881923 is about 395.5377453996.

The spelling of 61881923 in words is "sixty-one million, eight hundred eighty-one thousand, nine hundred twenty-three".