61010987 has 4 divisors (see below), whose sum is σ = 61038096. Its totient is φ = 60983880.

The previous prime is 61010953. The next prime is 61011053. The reversal of 61010987 is 78901016.

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 61010987 - 2⁶ = 61010923 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61016987) 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, 9839 + ... + 14792.

It is an arithmetic number, because the mean of its divisors is an integer number (15259524).

Almost surely, 2^61010987 is an apocalyptic number.

61010987 is a deficient number, since it is larger than the sum of its proper divisors (27109).

61010987 is a wasteful number, since it uses less digits than its factorization.

61010987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27108.

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 61010987 is about 7810.9530148376. The cubic root of 61010987 is about 393.6733509322.

The spelling of 61010987 in words is "sixty-one million, ten thousand, nine hundred eighty-seven".