30640843 has 2 divisors, whose sum is σ = 30640844. Its totient is φ = 30640842.

The previous prime is 30640829. The next prime is 30640859. The reversal of 30640843 is 34804603.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30640843 - 2¹⁷ = 30509771 is a prime.

It is a super-2 number, since 2×30640843² = 1877722519501298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30640823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320421 + 15320422.

It is an arithmetic number, because the mean of its divisors is an integer number (15320422).

Almost surely, 2^30640843 is an apocalyptic number.

30640843 is a deficient number, since it is larger than the sum of its proper divisors (1).

30640843 is an equidigital number, since it uses as much as digits as its factorization.

30640843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 30640843 is about 5535.4171477857. The cubic root of 30640843 is about 312.9201788925.

The spelling of 30640843 in words is "thirty million, six hundred forty thousand, eight hundred forty-three".