61971123 has 4 divisors (see below), whose sum is σ = 82628168. Its totient is φ = 41314080.

The previous prime is 61971097. The next prime is 61971149. The reversal of 61971123 is 32117916.

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

It is an interprime number because it is at equal distance from previous prime (61971097) and next prime (61971149).

It is not a de Polignac number, because 61971123 - 2¹⁶ = 61905587 is a prime.

It is a super-2 number, since 2×61971123² = 7680840171762258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61971163) 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, 10328518 + ... + 10328523.

It is an arithmetic number, because the mean of its divisors is an integer number (20657042).

Almost surely, 2^61971123 is an apocalyptic number.

61971123 is a deficient number, since it is larger than the sum of its proper divisors (20657045).

61971123 is a wasteful number, since it uses less digits than its factorization.

61971123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20657044.

The product of its digits is 2268, while the sum is 30.

The square root of 61971123 is about 7872.1739691142. The cubic root of 61971123 is about 395.7277040945.

The spelling of 61971123 in words is "sixty-one million, nine hundred seventy-one thousand, one hundred twenty-three".