30428591 has 2 divisors, whose sum is σ = 30428592. Its totient is φ = 30428590.

The previous prime is 30428581. The next prime is 30428597. The reversal of 30428591 is 19582403.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30428591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30428597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15214295 + 15214296.

It is an arithmetic number, because the mean of its divisors is an integer number (15214296).

Almost surely, 2^30428591 is an apocalyptic number.

30428591 is a deficient number, since it is larger than the sum of its proper divisors (1).

30428591 is an equidigital number, since it uses as much as digits as its factorization.

30428591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 30428591 is about 5516.2116529372. The cubic root of 30428591 is about 312.1959615700.

The spelling of 30428591 in words is "thirty million, four hundred twenty-eight thousand, five hundred ninety-one".