554198721 has 4 divisors (see below), whose sum is σ = 738931632. Its totient is φ = 369465812.

The previous prime is 554198717. The next prime is 554198767. The reversal of 554198721 is 127891455.

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 a cyclic number.

It is not a de Polignac number, because 554198721 - 2² = 554198717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (554198791) 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, 92366451 + ... + 92366456.

It is an arithmetic number, because the mean of its divisors is an integer number (184732908).

Almost surely, 2^554198721 is an apocalyptic number.

It is an amenable number.

554198721 is a deficient number, since it is larger than the sum of its proper divisors (184732911).

554198721 is a wasteful number, since it uses less digits than its factorization.

554198721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184732910.

The product of its digits is 100800, while the sum is 42.

The square root of 554198721 is about 23541.4256365242. The cubic root of 554198721 is about 821.4008975147.

The spelling of 554198721 in words is "five hundred fifty-four million, one hundred ninety-eight thousand, seven hundred twenty-one".