30661193 has 8 divisors (see below), whose sum is σ = 33026400. Its totient is φ = 28371168.

The previous prime is 30661187. The next prime is 30661237. The reversal of 30661193 is 39116603.

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

It is a cyclic number.

It is not a de Polignac number, because 30661193 - 2⁴ = 30661177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30661993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17948 + ... + 19581.

It is an arithmetic number, because the mean of its divisors is an integer number (4128300).

Almost surely, 2^30661193 is an apocalyptic number.

It is an amenable number.

30661193 is a deficient number, since it is larger than the sum of its proper divisors (2365207).

30661193 is a wasteful number, since it uses less digits than its factorization.

30661193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37591.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 30661193 is about 5537.2550058671. The cubic root of 30661193 is about 312.9894384797.

Adding to 30661193 its reverse (39116603), we get a palindrome (69777796).

The spelling of 30661193 in words is "thirty million, six hundred sixty-one thousand, one hundred ninety-three".