61039487 has 4 divisors (see below), whose sum is σ = 61478760. Its totient is φ = 60600216.

The previous prime is 61039483. The next prime is 61039499. The reversal of 61039487 is 78493016.

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 61039487 - 2² = 61039483 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 61039487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61039483) 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 3 ways as a sum of consecutive naturals, for example, 219428 + ... + 219705.

It is an arithmetic number, because the mean of its divisors is an integer number (15369690).

Almost surely, 2^61039487 is an apocalyptic number.

61039487 is a deficient number, since it is larger than the sum of its proper divisors (439273).

61039487 is a wasteful number, since it uses less digits than its factorization.

61039487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439272.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 61039487 is about 7812.7771630836. Note that the first 3 decimals coincide. The cubic root of 61039487 is about 393.7346401332.

The spelling of 61039487 in words is "sixty-one million, thirty-nine thousand, four hundred eighty-seven".