30440987 has 2 divisors, whose sum is σ = 30440988. Its totient is φ = 30440986.

The previous prime is 30440959. The next prime is 30441001. The reversal of 30440987 is 78904403.

It is a strong prime.

It is an emirp because it is prime and its reverse (78904403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30440987 - 2¹⁰ = 30439963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30440287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15220493 + 15220494.

It is an arithmetic number, because the mean of its divisors is an integer number (15220494).

Almost surely, 2^30440987 is an apocalyptic number.

30440987 is a deficient number, since it is larger than the sum of its proper divisors (1).

30440987 is an equidigital number, since it uses as much as digits as its factorization.

30440987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 30440987 is about 5517.3351357336. The cubic root of 30440987 is about 312.2383499467.

The spelling of 30440987 in words is "thirty million, four hundred forty thousand, nine hundred eighty-seven".