30961345 has 4 divisors (see below), whose sum is σ = 37153620. Its totient is φ = 24769072.

The previous prime is 30961339. The next prime is 30961349. The reversal of 30961345 is 54316903.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 19509889 = 3384^2 + 4417^2 .

It is a cyclic number.

It is not a de Polignac number, because 30961345 - 2⁵ = 30961313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30961349) 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 3 ways as a sum of consecutive naturals, for example, 3096130 + ... + 3096139.

It is an arithmetic number, because the mean of its divisors is an integer number (9288405).

Almost surely, 2^30961345 is an apocalyptic number.

It is an amenable number.

30961345 is a deficient number, since it is larger than the sum of its proper divisors (6192275).

30961345 is an equidigital number, since it uses as much as digits as its factorization.

30961345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6192274.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 30961345 is about 5564.2919585514. The cubic root of 30961345 is about 314.0074409639.

The spelling of 30961345 in words is "thirty million, nine hundred sixty-one thousand, three hundred forty-five".