30666431 has 2 divisors, whose sum is σ = 30666432. Its totient is φ = 30666430.

The previous prime is 30666397. The next prime is 30666443. The reversal of 30666431 is 13466603.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30666431 - 2⁶ = 30666367 is a prime.

It is a super-2 number, since 2×30666431² = 1880859980555522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30666394 and 30666403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30666481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15333215 + 15333216.

It is an arithmetic number, because the mean of its divisors is an integer number (15333216).

Almost surely, 2^30666431 is an apocalyptic number.

30666431 is a deficient number, since it is larger than the sum of its proper divisors (1).

30666431 is an equidigital number, since it uses as much as digits as its factorization.

30666431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 30666431 is about 5537.7279637050. The cubic root of 30666431 is about 313.0072606318.

The spelling of 30666431 in words is "thirty million, six hundred sixty-six thousand, four hundred thirty-one".