61487543 has 4 divisors (see below), whose sum is σ = 66217368. Its totient is φ = 56757720.

The previous prime is 61487537. The next prime is 61487551. The reversal of 61487543 is 34578416.

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 61487543 - 2¹⁶ = 61422007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61487497 and 61487506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61487593) 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, 2364893 + ... + 2364918.

It is an arithmetic number, because the mean of its divisors is an integer number (16554342).

Almost surely, 2^61487543 is an apocalyptic number.

61487543 is a deficient number, since it is larger than the sum of its proper divisors (4729825).

61487543 is a wasteful number, since it uses less digits than its factorization.

61487543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4729824.

The product of its digits is 80640, while the sum is 38.

The square root of 61487543 is about 7841.3993011452. The cubic root of 61487543 is about 394.6956861378.

The spelling of 61487543 in words is "sixty-one million, four hundred eighty-seven thousand, five hundred forty-three".