30470381 has 2 divisors, whose sum is σ = 30470382. Its totient is φ = 30470380.

The previous prime is 30470371. The next prime is 30470383. The reversal of 30470381 is 18307403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 13322500 = 4141^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 30470381 - 2²² = 26276077 is a prime.

It is a super-2 number, since 2×30470381² = 1856888236570322, which contains 22 as substring.

Together with 30470383, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30470381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30470383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15235190 + 15235191.

It is an arithmetic number, because the mean of its divisors is an integer number (15235191).

Almost surely, 2^30470381 is an apocalyptic number.

It is an amenable number.

30470381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30470381 is an equidigital number, since it uses as much as digits as its factorization.

30470381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 30470381 is about 5519.9982789852. The cubic root of 30470381 is about 312.3388173588.

Adding to 30470381 its reverse (18307403), we get a palindrome (48777784).

The spelling of 30470381 in words is "thirty million, four hundred seventy thousand, three hundred eighty-one".