30279121 has 2 divisors, whose sum is σ = 30279122. Its totient is φ = 30279120.

The previous prime is 30279107. The next prime is 30279127. The reversal of 30279121 is 12197203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26378496 + 3900625 = 5136^2 + 1975^2 .

It is a cyclic number.

It is not a de Polignac number, because 30279121 - 2¹⁹ = 29754833 is a prime.

It is not a weakly prime, because it can be changed into another prime (30279127) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15139560 + 15139561.

It is an arithmetic number, because the mean of its divisors is an integer number (15139561).

Almost surely, 2^30279121 is an apocalyptic number.

It is an amenable number.

30279121 is a deficient number, since it is larger than the sum of its proper divisors (1).

30279121 is an equidigital number, since it uses as much as digits as its factorization.

30279121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 30279121 is about 5502.6467268034. The cubic root of 30279121 is about 311.6839371342.

The spelling of 30279121 in words is "thirty million, two hundred seventy-nine thousand, one hundred twenty-one".