545929021 has 4 divisors (see below), whose sum is σ = 595558944. Its totient is φ = 496299100.

The previous prime is 545928979. The next prime is 545929039. The reversal of 545929021 is 120929545.

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 545929021 - 2⁷ = 545928893 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 (545929091) 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, 24814945 + ... + 24814966.

It is an arithmetic number, because the mean of its divisors is an integer number (148889736).

Almost surely, 2^545929021 is an apocalyptic number.

It is an amenable number.

545929021 is a deficient number, since it is larger than the sum of its proper divisors (49629923).

545929021 is a wasteful number, since it uses less digits than its factorization.

545929021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49629922.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 545929021 is about 23365.1240313421. The cubic root of 545929021 is about 817.2947838783.

It can be divided in two parts, 545 and 929021, that added together give a triangular number (929566 = T₁₃₆₃).

The spelling of 545929021 in words is "five hundred forty-five million, nine hundred twenty-nine thousand, twenty-one".