30748261 has 2 divisors, whose sum is σ = 30748262. Its totient is φ = 30748260.

The previous prime is 30748247. The next prime is 30748273. The reversal of 30748261 is 16284703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25060036 + 5688225 = 5006^2 + 2385^2 .

It is a cyclic number.

It is not a de Polignac number, because 30748261 - 2⁵ = 30748229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30748241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15374130 + 15374131.

It is an arithmetic number, because the mean of its divisors is an integer number (15374131).

Almost surely, 2^30748261 is an apocalyptic number.

It is an amenable number.

30748261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30748261 is an equidigital number, since it uses as much as digits as its factorization.

30748261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 30748261 is about 5545.1114506383. Note that the first 3 decimals coincide. The cubic root of 30748261 is about 313.2854218529.

The spelling of 30748261 in words is "thirty million, seven hundred forty-eight thousand, two hundred sixty-one".