30961405 has 8 divisors (see below), whose sum is σ = 38352384. Its totient is φ = 23970000.

The previous prime is 30961397. The next prime is 30961429. The reversal of 30961405 is 50416903.

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

It is not a de Polignac number, because 30961405 - 2³ = 30961397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 99721 + ... + 100030.

It is an arithmetic number, because the mean of its divisors is an integer number (4794048).

Almost surely, 2^30961405 is an apocalyptic number.

It is an amenable number.

30961405 is a deficient number, since it is larger than the sum of its proper divisors (7390979).

30961405 is a wasteful number, since it uses less digits than its factorization.

30961405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199787.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 30961405 is about 5564.2973500704. The cubic root of 30961405 is about 314.0076438022.

The spelling of 30961405 in words is "thirty million, nine hundred sixty-one thousand, four hundred five".