8629409 has 2 divisors, whose sum is σ = 8629410. Its totient is φ = 8629408.

The previous prime is 8629349. The next prime is 8629429. The reversal of 8629409 is 9049268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7480225 + 1149184 = 2735^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 8629409 - 2¹² = 8625313 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8629429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4314704 + 4314705.

It is an arithmetic number, because the mean of its divisors is an integer number (4314705).

Almost surely, 2^8629409 is an apocalyptic number.

It is an amenable number.

8629409 is a deficient number, since it is larger than the sum of its proper divisors (1).

8629409 is an equidigital number, since it uses as much as digits as its factorization.

8629409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 8629409 is about 2937.5855732217. The cubic root of 8629409 is about 205.1132350815.

The spelling of 8629409 in words is "eight million, six hundred twenty-nine thousand, four hundred nine".