61063987 has 4 divisors (see below), whose sum is σ = 61110216. Its totient is φ = 61017760.

The previous prime is 61063979. The next prime is 61063991. The reversal of 61063987 is 78936016.

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 61063987 - 2³ = 61063979 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61063907) 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, 21073 + ... + 23794.

It is an arithmetic number, because the mean of its divisors is an integer number (15277554).

Almost surely, 2^61063987 is an apocalyptic number.

61063987 is a deficient number, since it is larger than the sum of its proper divisors (46229).

61063987 is a wasteful number, since it uses less digits than its factorization.

61063987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46228.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 61063987 is about 7814.3449501542. The cubic root of 61063987 is about 393.7873120936.

The spelling of 61063987 in words is "sixty-one million, sixty-three thousand, nine hundred eighty-seven".