30253991 has 2 divisors, whose sum is σ = 30253992. Its totient is φ = 30253990.

The previous prime is 30253973. The next prime is 30254017. The reversal of 30253991 is 19935203.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30253991 - 2¹⁰ = 30252967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30253291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15126995 + 15126996.

It is an arithmetic number, because the mean of its divisors is an integer number (15126996).

Almost surely, 2^30253991 is an apocalyptic number.

30253991 is a deficient number, since it is larger than the sum of its proper divisors (1).

30253991 is an equidigital number, since it uses as much as digits as its factorization.

30253991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 30253991 is about 5500.3628062156. The cubic root of 30253991 is about 311.5976864444.

The spelling of 30253991 in words is "thirty million, two hundred fifty-three thousand, nine hundred ninety-one".