8273921 has 2 divisors, whose sum is σ = 8273922. Its totient is φ = 8273920.

The previous prime is 8273899. The next prime is 8273933. The reversal of 8273921 is 1293728.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4682896 + 3591025 = 2164^2 + 1895^2 .

It is a cyclic number.

It is not a de Polignac number, because 8273921 - 2¹⁴ = 8257537 is a prime.

It is not a weakly prime, because it can be changed into another prime (8273971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4136960 + 4136961.

It is an arithmetic number, because the mean of its divisors is an integer number (4136961).

It is a Proth number, since it is equal to 505 ⋅ 2¹⁴ + 1 and 505 < 2¹⁴.

Almost surely, 2^8273921 is an apocalyptic number.

It is an amenable number.

8273921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8273921 is an equidigital number, since it uses as much as digits as its factorization.

8273921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 8273921 is about 2876.4424207691. The cubic root of 8273921 is about 202.2571065265.

The spelling of 8273921 in words is "eight million, two hundred seventy-three thousand, nine hundred twenty-one".