54887961 has 4 divisors (see below), whose sum is σ = 73183952. Its totient is φ = 36591972.

The previous prime is 54887957. The next prime is 54887969. The reversal of 54887961 is 16978845.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 54887961 - 2² = 54887957 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 54887961.

It is not an unprimeable number, because it can be changed into a prime (54887969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9147991 + ... + 9147996.

It is an arithmetic number, because the mean of its divisors is an integer number (18295988).

Almost surely, 2^54887961 is an apocalyptic number.

It is an amenable number.

54887961 is a deficient number, since it is larger than the sum of its proper divisors (18295991).

54887961 is a wasteful number, since it uses less digits than its factorization.

54887961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18295990.

The product of its digits is 483840, while the sum is 48.

The square root of 54887961 is about 7408.6409684908. The cubic root of 54887961 is about 380.0368408418.

The spelling of 54887961 in words is "fifty-four million, eight hundred eighty-seven thousand, nine hundred sixty-one".