61108743 has 4 divisors (see below), whose sum is σ = 81478328. Its totient is φ = 40739160.

The previous prime is 61108741. The next prime is 61108753. The reversal of 61108743 is 34780116.

It is a happy number.

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

It is not a de Polignac number, because 61108743 - 2¹ = 61108741 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 61108743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61108741) 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, 10184788 + ... + 10184793.

It is an arithmetic number, because the mean of its divisors is an integer number (20369582).

Almost surely, 2^61108743 is an apocalyptic number.

61108743 is a deficient number, since it is larger than the sum of its proper divisors (20369585).

61108743 is a wasteful number, since it uses less digits than its factorization.

61108743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20369584.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 61108743 is about 7817.2081333427. The cubic root of 61108743 is about 393.8834955765.

Adding to 61108743 its reverse (34780116), we get a palindrome (95888859).

The spelling of 61108743 in words is "sixty-one million, one hundred eight thousand, seven hundred forty-three".