30861269 has 2 divisors, whose sum is σ = 30861270. Its totient is φ = 30861268.

The previous prime is 30861247. The next prime is 30861283. The reversal of 30861269 is 96216803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30747025 + 114244 = 5545^2 + 338^2 .

It is a cyclic number.

It is not a de Polignac number, because 30861269 - 2⁸ = 30861013 is a prime.

It is a super-2 number, since 2×30861269² = 1904835848580722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30861289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15430634 + 15430635.

It is an arithmetic number, because the mean of its divisors is an integer number (15430635).

Almost surely, 2^30861269 is an apocalyptic number.

It is an amenable number.

30861269 is a deficient number, since it is larger than the sum of its proper divisors (1).

30861269 is an equidigital number, since it uses as much as digits as its factorization.

30861269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 30861269 is about 5555.2919815254. The cubic root of 30861269 is about 313.6687549089.

The spelling of 30861269 in words is "thirty million, eight hundred sixty-one thousand, two hundred sixty-nine".