30693391 has 4 divisors (see below), whose sum is σ = 30736800. Its totient is φ = 30649984.

The previous prime is 30693367. The next prime is 30693409. The reversal of 30693391 is 19339603.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30693391 - 2⁷ = 30693263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30690391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20626 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (7684200).

Almost surely, 2^30693391 is an apocalyptic number.

30693391 is a deficient number, since it is larger than the sum of its proper divisors (43409).

30693391 is an equidigital number, since it uses as much as digits as its factorization.

30693391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43408.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 30693391 is about 5540.1616402412. The cubic root of 30693391 is about 313.0989592064.

The spelling of 30693391 in words is "thirty million, six hundred ninety-three thousand, three hundred ninety-one".