30291393 has 16 divisors (see below), whose sum is σ = 45086976. Its totient is φ = 17930640.

The previous prime is 30291389. The next prime is 30291397. The reversal of 30291393 is 39319203.

It is an interprime number because it is at equal distance from previous prime (30291389) and next prime (30291397).

It is not a de Polignac number, because 30291393 - 2² = 30291389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30291393.

It is not an unprimeable number, because it can be changed into a prime (30291397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9255 + ... + 12092.

It is an arithmetic number, because the mean of its divisors is an integer number (2817936).

Almost surely, 2^30291393 is an apocalyptic number.

30291393 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

30291393 is a deficient number, since it is larger than the sum of its proper divisors (14795583).

30291393 is a wasteful number, since it uses less digits than its factorization.

30291393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21404.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 30291393 is about 5503.7617135919. The cubic root of 30291393 is about 311.7260395083.

The spelling of 30291393 in words is "thirty million, two hundred ninety-one thousand, three hundred ninety-three".