547611921 has 12 divisors (see below), whose sum is σ = 820291472. Its totient is φ = 365074452.

The previous prime is 547611917. The next prime is 547611937. The reversal of 547611921 is 129116745.

It is not a de Polignac number, because 547611921 - 2² = 547611917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (547611941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1126531 + ... + 1127016.

Almost surely, 2^547611921 is an apocalyptic number.

It is an amenable number.

547611921 is a deficient number, since it is larger than the sum of its proper divisors (272679551).

547611921 is an equidigital number, since it uses as much as digits as its factorization.

547611921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253562 (or 2253550 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 547611921 is about 23401.1093967786. The cubic root of 547611921 is about 818.1337296282.

The spelling of 547611921 in words is "five hundred forty-seven million, six hundred eleven thousand, nine hundred twenty-one".