30920493 has 8 divisors (see below), whose sum is σ = 42341728. Its totient is φ = 20056464.

The previous prime is 30920479. The next prime is 30920503. The reversal of 30920493 is 39402903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30920493 - 2²¹ = 28823341 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30920493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30920413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139171 + ... + 139392.

It is an arithmetic number, because the mean of its divisors is an integer number (5292716).

Almost surely, 2^30920493 is an apocalyptic number.

It is an amenable number.

30920493 is a deficient number, since it is larger than the sum of its proper divisors (11421235).

30920493 is a wasteful number, since it uses less digits than its factorization.

30920493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278603.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 30920493 is about 5560.6198395503. The cubic root of 30920493 is about 313.8692742917.

It can be divided in two parts, 30920 and 493, that added together give a palindrome (31413).

The spelling of 30920493 in words is "thirty million, nine hundred twenty thousand, four hundred ninety-three".