30487321 has 2 divisors, whose sum is σ = 30487322. Its totient is φ = 30487320.

The previous prime is 30487319. The next prime is 30487339. The reversal of 30487321 is 12378403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29855296 + 632025 = 5464^2 + 795^2 .

It is an emirp because it is prime and its reverse (12378403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30487321 - 2¹ = 30487319 is a prime.

Together with 30487319, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30487321.

It is not a weakly prime, because it can be changed into another prime (30487361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15243660 + 15243661.

It is an arithmetic number, because the mean of its divisors is an integer number (15243661).

Almost surely, 2^30487321 is an apocalyptic number.

It is an amenable number.

30487321 is a deficient number, since it is larger than the sum of its proper divisors (1).

30487321 is an equidigital number, since it uses as much as digits as its factorization.

30487321 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 30487321 is about 5521.5324865476. The cubic root of 30487321 is about 312.3966881958.

The spelling of 30487321 in words is "thirty million, four hundred eighty-seven thousand, three hundred twenty-one".