61438123 has 4 divisors (see below), whose sum is σ = 61815208. Its totient is φ = 61061040.

The previous prime is 61438067. The next prime is 61438127. The reversal of 61438123 is 32183416.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61438123 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61438091 and 61438100.

It is not an unprimeable number, because it can be changed into a prime (61438127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188298 + ... + 188623.

It is an arithmetic number, because the mean of its divisors is an integer number (15453802).

Almost surely, 2^61438123 is an apocalyptic number.

61438123 is a deficient number, since it is larger than the sum of its proper divisors (377085).

61438123 is a wasteful number, since it uses less digits than its factorization.

61438123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377084.

The product of its digits is 3456, while the sum is 28.

The square root of 61438123 is about 7838.2474444228. The cubic root of 61438123 is about 394.5899135533.

The spelling of 61438123 in words is "sixty-one million, four hundred thirty-eight thousand, one hundred twenty-three".