545023987 has 4 divisors (see below), whose sum is σ = 573709480. Its totient is φ = 516338496.

The previous prime is 545023979. The next prime is 545023991. The reversal of 545023987 is 789320545.

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 545023987 - 2³ = 545023979 is a prime.

It is a super-2 number, since 2×545023987² = 594102292810752338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545023907) 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, 14342718 + ... + 14342755.

It is an arithmetic number, because the mean of its divisors is an integer number (143427370).

Almost surely, 2^545023987 is an apocalyptic number.

545023987 is a deficient number, since it is larger than the sum of its proper divisors (28685493).

545023987 is a wasteful number, since it uses less digits than its factorization.

545023987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28685492.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 545023987 is about 23345.7487992996. The cubic root of 545023987 is about 816.8429005385.

The spelling of 545023987 in words is "five hundred forty-five million, twenty-three thousand, nine hundred eighty-seven".