8620691 has 2 divisors, whose sum is σ = 8620692. Its totient is φ = 8620690.

The previous prime is 8620687. The next prime is 8620721. The reversal of 8620691 is 1960268.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8620691 - 2² = 8620687 is a prime.

It is not a weakly prime, because it can be changed into another prime (8620621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4310345 + 4310346.

It is an arithmetic number, because the mean of its divisors is an integer number (4310346).

Almost surely, 2^8620691 is an apocalyptic number.

8620691 is a deficient number, since it is larger than the sum of its proper divisors (1).

8620691 is an equidigital number, since it uses as much as digits as its factorization.

8620691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 8620691 is about 2936.1013265894. The cubic root of 8620691 is about 205.0441388201.

The spelling of 8620691 in words is "eight million, six hundred twenty thousand, six hundred ninety-one".