61838123 has 4 divisors (see below), whose sum is σ = 62115648. Its totient is φ = 61560600.

The previous prime is 61838113. The next prime is 61838173. The reversal of 61838123 is 32183816.

It is a happy number.

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 61838123 - 2⁶ = 61838059 is a prime.

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

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 61838123.

It is not an unprimeable number, because it can be changed into a prime (61838113) 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, 138428 + ... + 138873.

It is an arithmetic number, because the mean of its divisors is an integer number (15528912).

Almost surely, 2^61838123 is an apocalyptic number.

61838123 is a deficient number, since it is larger than the sum of its proper divisors (277525).

61838123 is a wasteful number, since it uses less digits than its factorization.

61838123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277524.

The product of its digits is 6912, while the sum is 32.

The square root of 61838123 is about 7863.7219559188. The cubic root of 61838123 is about 395.4444028883. Note that the first 4 decimals are identical.

The spelling of 61838123 in words is "sixty-one million, eight hundred thirty-eight thousand, one hundred twenty-three".