547749321 has 16 divisors (see below), whose sum is σ = 847125504. Its totient is φ = 308327184.

The previous prime is 547749281. The next prime is 547749341. The reversal of 547749321 is 123947745.

It is not a de Polignac number, because 547749321 - 2¹⁴ = 547732937 is a prime.

It is a super-2 number, since 2×547749321² = 600058637311922082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (547749341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193245 + ... + 196058.

It is an arithmetic number, because the mean of its divisors is an integer number (52945344).

Almost surely, 2^547749321 is an apocalyptic number.

It is an amenable number.

547749321 is a deficient number, since it is larger than the sum of its proper divisors (299376183).

547749321 is a wasteful number, since it uses less digits than its factorization.

547749321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389380.

The product of its digits is 211680, while the sum is 42.

The square root of 547749321 is about 23404.0449709019. The cubic root of 547749321 is about 818.2021492333.

The spelling of 547749321 in words is "five hundred forty-seven million, seven hundred forty-nine thousand, three hundred twenty-one".