30949 has 2 divisors, whose sum is σ = 30950. Its totient is φ = 30948.
The previous prime is 30941. The next prime is 30971. The reversal of 30949 is 94903.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 30625 + 324 = 175^2 + 18^2 .
It is an emirp because it is prime and its reverse (94903) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 30949 - 23 = 30941 is a prime.
It is an alternating number because its digits alternate between odd and even.
30949 is a lucky number.
It is a plaindrome in base 13.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (30941) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15474 + 15475.
It is an arithmetic number, because the mean of its divisors is an integer number (15475).
230949 is an apocalyptic number.
It is an amenable number.
30949 is a deficient number, since it is larger than the sum of its proper divisors (1).
30949 is an equidigital number, since it uses as much as digits as its factorization.
30949 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 972, while the sum is 25.
The square root of 30949 is about 175.9232787325. The cubic root of 30949 is about 31.3965701421.
It can be divided in two parts, 30 and 949, that added together give a palindrome (979).
The spelling of 30949 in words is "thirty thousand, nine hundred forty-nine".
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