30640087 has 2 divisors, whose sum is σ = 30640088. Its totient is φ = 30640086.

The previous prime is 30640019. The next prime is 30640111. The reversal of 30640087 is 78004603.

It is a strong prime.

It is an emirp because it is prime and its reverse (78004603) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30640087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30641087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15320043 + 15320044.

It is an arithmetic number, because the mean of its divisors is an integer number (15320044).

Almost surely, 2^30640087 is an apocalyptic number.

30640087 is a deficient number, since it is larger than the sum of its proper divisors (1).

30640087 is an equidigital number, since it uses as much as digits as its factorization.

30640087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 30640087 is about 5535.3488598281. The cubic root of 30640087 is about 312.9176053166.

The spelling of 30640087 in words is "thirty million, six hundred forty thousand, eighty-seven".