61374543 has 4 divisors (see below), whose sum is σ = 81832728. Its totient is φ = 40916360.

The previous prime is 61374529. The next prime is 61374563. The reversal of 61374543 is 34547316.

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 61374543 - 2¹³ = 61366351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61374563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10229088 + ... + 10229093.

It is an arithmetic number, because the mean of its divisors is an integer number (20458182).

Almost surely, 2^61374543 is an apocalyptic number.

61374543 is a deficient number, since it is larger than the sum of its proper divisors (20458185).

61374543 is a wasteful number, since it uses less digits than its factorization.

61374543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20458184.

The product of its digits is 30240, while the sum is 33.

The square root of 61374543 is about 7834.1906410299. The cubic root of 61374543 is about 394.4537511584.

The spelling of 61374543 in words is "sixty-one million, three hundred seventy-four thousand, five hundred forty-three".