30667261 has 2 divisors, whose sum is σ = 30667262. Its totient is φ = 30667260.

The previous prime is 30667253. The next prime is 30667267. The reversal of 30667261 is 16276603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19980900 + 10686361 = 4470^2 + 3269^2 .

It is a cyclic number.

It is not a de Polignac number, because 30667261 - 2³ = 30667253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30667267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15333630 + 15333631.

It is an arithmetic number, because the mean of its divisors is an integer number (15333631).

Almost surely, 2^30667261 is an apocalyptic number.

It is an amenable number.

30667261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30667261 is an equidigital number, since it uses as much as digits as its factorization.

30667261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 30667261 is about 5537.8029036794. The cubic root of 30667261 is about 313.0100844978.

The spelling of 30667261 in words is "thirty million, six hundred sixty-seven thousand, two hundred sixty-one".