30537121 has 2 divisors, whose sum is σ = 30537122. Its totient is φ = 30537120.

The previous prime is 30537109. The next prime is 30537179. The reversal of 30537121 is 12173503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20802721 + 9734400 = 4561^2 + 3120^2 .

It is an emirp because it is prime and its reverse (12173503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30537121 - 2⁷ = 30536993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30537092 and 30537101.

It is not a weakly prime, because it can be changed into another prime (30537191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15268560 + 15268561.

It is an arithmetic number, because the mean of its divisors is an integer number (15268561).

Almost surely, 2^30537121 is an apocalyptic number.

It is an amenable number.

30537121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30537121 is an equidigital number, since it uses as much as digits as its factorization.

30537121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 30537121 is about 5526.0402640589. The cubic root of 30537121 is about 312.5666921126.

The spelling of 30537121 in words is "thirty million, five hundred thirty-seven thousand, one hundred twenty-one".