54321987 has 8 divisors (see below), whose sum is σ = 76689936. Its totient is φ = 34084352.

The previous prime is 54321983. The next prime is 54321997. The reversal of 54321987 is 78912345.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54321987 - 2² = 54321983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54321983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532518 + ... + 532619.

It is an arithmetic number, because the mean of its divisors is an integer number (9586242).

Almost surely, 2^54321987 is an apocalyptic number.

54321987 is a deficient number, since it is larger than the sum of its proper divisors (22367949).

54321987 is a wasteful number, since it uses less digits than its factorization.

54321987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065157.

The product of its digits is 60480, while the sum is 39.

The square root of 54321987 is about 7370.3451072524. The cubic root of 54321987 is about 378.7260826427.

It can be divided in two parts, 543 and 21987, that multiplied together give a triangular number (11938941 = T₄₈₈₆).

The spelling of 54321987 in words is "fifty-four million, three hundred twenty-one thousand, nine hundred eighty-seven".