8473921 has 9 divisors (see below), whose sum is σ = 8809699. Its totient is φ = 8150800.

The previous prime is 8473919. The next prime is 8473951. The reversal of 8473921 is 1293748.

The square root of 8473921 is 2911.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 408321 + 8065600 = 639^2 + 2840^2 .

It is not a de Polignac number, because 8473921 - 2¹ = 8473919 is a prime.

It is a super-2 number, since 2×8473921² = 143614674228482, which contains 22 as substring.

It is a Duffinian number.

Its product of digits (12096) is a multiple of the sum of its prime divisors (112).

It is not an unprimeable number, because it can be changed into a prime (8473901) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 119316 + ... + 119386.

Almost surely, 2^8473921 is an apocalyptic number.

8473921 is the 2911-st square number and also the 1681-st octagonal number.

8473921 is the 1456-th centered octagonal number.

It is an amenable number.

8473921 is a deficient number, since it is larger than the sum of its proper divisors (335778).

8473921 is an frugal number, since it uses more digits than its factorization.

8473921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 112 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The cubic root of 8473921 is about 203.8738246414.

The spelling of 8473921 in words is "eight million, four hundred seventy-three thousand, nine hundred twenty-one".