30448861 has 2 divisors, whose sum is σ = 30448862. Its totient is φ = 30448860.

The previous prime is 30448843. The next prime is 30448877. The reversal of 30448861 is 16884403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28153636 + 2295225 = 5306^2 + 1515^2 .

It is an emirp because it is prime and its reverse (16884403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30448861 - 2²³ = 22060253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30448841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15224430 + 15224431.

It is an arithmetic number, because the mean of its divisors is an integer number (15224431).

Almost surely, 2^30448861 is an apocalyptic number.

It is an amenable number.

30448861 is a deficient number, since it is larger than the sum of its proper divisors (1).

30448861 is an equidigital number, since it uses as much as digits as its factorization.

30448861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 30448861 is about 5518.0486587199. The cubic root of 30448861 is about 312.2652692756.

The spelling of 30448861 in words is "thirty million, four hundred forty-eight thousand, eight hundred sixty-one".