30640859 has 2 divisors, whose sum is σ = 30640860. Its totient is φ = 30640858.

The previous prime is 30640843. The next prime is 30640871. The reversal of 30640859 is 95804603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30640859 - 2⁴ = 30640843 is a prime.

It is not a weakly prime, because it can be changed into another prime (30640829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320429 + 15320430.

It is an arithmetic number, because the mean of its divisors is an integer number (15320430).

Almost surely, 2^30640859 is an apocalyptic number.

30640859 is a deficient number, since it is larger than the sum of its proper divisors (1).

30640859 is an equidigital number, since it uses as much as digits as its factorization.

30640859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 30640859 is about 5535.4185930244. The cubic root of 30640859 is about 312.9202333592.

The spelling of 30640859 in words is "thirty million, six hundred forty thousand, eight hundred fifty-nine".