30649391 has 2 divisors, whose sum is σ = 30649392. Its totient is φ = 30649390.

The previous prime is 30649349. The next prime is 30649397. The reversal of 30649391 is 19394603.

30649391 is nontrivially palindromic in base 13.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30649391 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 (30649397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15324695 + 15324696.

It is an arithmetic number, because the mean of its divisors is an integer number (15324696).

Almost surely, 2^30649391 is an apocalyptic number.

30649391 is a deficient number, since it is larger than the sum of its proper divisors (1).

30649391 is an equidigital number, since it uses as much as digits as its factorization.

30649391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 30649391 is about 5536.1892128069. The cubic root of 30649391 is about 312.9492750566.

The spelling of 30649391 in words is "thirty million, six hundred forty-nine thousand, three hundred ninety-one".