61996543 has 4 divisors (see below), whose sum is σ = 70853200. Its totient is φ = 53139888.

The previous prime is 61996541. The next prime is 61996609. The reversal of 61996543 is 34569916.

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 61996543 - 2¹ = 61996541 is a prime.

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 61996543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61996541) 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, 4428318 + ... + 4428331.

It is an arithmetic number, because the mean of its divisors is an integer number (17713300).

Almost surely, 2^61996543 is an apocalyptic number.

61996543 is a deficient number, since it is larger than the sum of its proper divisors (8856657).

61996543 is an equidigital number, since it uses as much as digits as its factorization.

61996543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8856656.

The product of its digits is 174960, while the sum is 43.

The square root of 61996543 is about 7873.7883512322. The cubic root of 61996543 is about 395.7818046855.

The spelling of 61996543 in words is "sixty-one million, nine hundred ninety-six thousand, five hundred forty-three".