8737021 has 2 divisors, whose sum is σ = 8737022. Its totient is φ = 8737020.

The previous prime is 8736989. The next prime is 8737039. The reversal of 8737021 is 1207378.

It is a happy number.

8737021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5812921 + 2924100 = 2411^2 + 1710^2 .

It is a cyclic number.

It is not a de Polignac number, because 8737021 - 2⁵ = 8736989 is a prime.

It is a Chen prime.

It is equal to p₅₈₆₀₄₅ and since 8737021 and 586045 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8737061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4368510 + 4368511.

It is an arithmetic number, because the mean of its divisors is an integer number (4368511).

Almost surely, 2^8737021 is an apocalyptic number.

It is an amenable number.

8737021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8737021 is an equidigital number, since it uses as much as digits as its factorization.

8737021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 8737021 is about 2955.8452259887. The cubic root of 8737021 is about 205.9623285499.

The spelling of 8737021 in words is "eight million, seven hundred thirty-seven thousand, twenty-one".