61154887 has 4 divisors (see below), whose sum is σ = 61726536. Its totient is φ = 60583240.

The previous prime is 61154869. The next prime is 61154897. The reversal of 61154887 is 78845116.

61154887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61154887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61154867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285664 + ... + 285877.

It is an arithmetic number, because the mean of its divisors is an integer number (15431634).

Almost surely, 2^61154887 is an apocalyptic number.

61154887 is a deficient number, since it is larger than the sum of its proper divisors (571649).

61154887 is a wasteful number, since it uses less digits than its factorization.

61154887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571648.

The product of its digits is 53760, while the sum is 40.

The square root of 61154887 is about 7820.1590137286. The cubic root of 61154887 is about 393.9826128017.

The spelling of 61154887 in words is "sixty-one million, one hundred fifty-four thousand, eight hundred eighty-seven".