61920123 has 8 divisors (see below), whose sum is σ = 82660368. Its totient is φ = 41229984.

The previous prime is 61920119. The next prime is 61920139. The reversal of 61920123 is 32102916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61920123 - 2² = 61920119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61920093 and 61920102.

It is not an unprimeable number, because it can be changed into a prime (61920143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9540 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (10332546).

Almost surely, 2^61920123 is an apocalyptic number.

61920123 is a deficient number, since it is larger than the sum of its proper divisors (20740245).

61920123 is a wasteful number, since it uses less digits than its factorization.

61920123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25053.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 61920123 is about 7868.9340447102. The cubic root of 61920123 is about 395.6191177571.

The spelling of 61920123 in words is "sixty-one million, nine hundred twenty thousand, one hundred twenty-three".