8479621 has 2 divisors, whose sum is σ = 8479622. Its totient is φ = 8479620.

The previous prime is 8479619. The next prime is 8479631. The reversal of 8479621 is 1269748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8381025 + 98596 = 2895^2 + 314^2 .

It is a cyclic number.

It is not a de Polignac number, because 8479621 - 2¹ = 8479619 is a prime.

Together with 8479619, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8479631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239810 + 4239811.

It is an arithmetic number, because the mean of its divisors is an integer number (4239811).

Almost surely, 2^8479621 is an apocalyptic number.

It is an amenable number.

8479621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8479621 is an equidigital number, since it uses as much as digits as its factorization.

8479621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 8479621 is about 2911.9788804179. The cubic root of 8479621 is about 203.9195264419.

The spelling of 8479621 in words is "eight million, four hundred seventy-nine thousand, six hundred twenty-one".