61487743 has 8 divisors (see below), whose sum is σ = 66956400. Its totient is φ = 56242368.

The previous prime is 61487731. The next prime is 61487749. The reversal of 61487743 is 34778416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61487743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61487696 and 61487705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61487749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55246 + ... + 56347.

It is an arithmetic number, because the mean of its divisors is an integer number (8369550).

Almost surely, 2^61487743 is an apocalyptic number.

61487743 is a deficient number, since it is larger than the sum of its proper divisors (5468657).

61487743 is a wasteful number, since it uses less digits than its factorization.

61487743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111641.

The product of its digits is 112896, while the sum is 40.

The square root of 61487743 is about 7841.4120539607. The cubic root of 61487743 is about 394.6961140785.

The spelling of 61487743 in words is "sixty-one million, four hundred eighty-seven thousand, seven hundred forty-three".