30035981 has 2 divisors, whose sum is σ = 30035982. Its totient is φ = 30035980.

The previous prime is 30035969. The next prime is 30035983. The reversal of 30035981 is 18953003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 12888100 = 4141^2 + 3590^2 .

It is a cyclic number.

It is not a de Polignac number, because 30035981 - 2⁶ = 30035917 is a prime.

It is a super-2 number, since 2×30035981² = 1804320309264722, which contains 22 as substring.

Together with 30035983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30035983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15017990 + 15017991.

It is an arithmetic number, because the mean of its divisors is an integer number (15017991).

Almost surely, 2^30035981 is an apocalyptic number.

It is an amenable number.

30035981 is a deficient number, since it is larger than the sum of its proper divisors (1).

30035981 is an equidigital number, since it uses as much as digits as its factorization.

30035981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 30035981 is about 5480.5091916719. The cubic root of 30035981 is about 310.8474246683.

Adding to 30035981 its reverse (18953003), we get a palindrome (48988984).

The spelling of 30035981 in words is "thirty million, thirty-five thousand, nine hundred eighty-one".