30994961593 has 4 divisors (see below), whose sum is σ = 31750936308. Its totient is φ = 30238986880.

The previous prime is 30994961567. The next prime is 30994961597. The reversal of 30994961593 is 39516949903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39516949903 = 6997 ⋅5647699.

It can be written as a sum of positive squares in 2 ways, for example, as 17190356544 + 13804605049 = 131112^2 + 117493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30994961593 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30994961597) 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, 377987296 + ... + 377987377.

It is an arithmetic number, because the mean of its divisors is an integer number (7937734077).

Almost surely, 2^30994961593 is an apocalyptic number.

It is an amenable number.

30994961593 is a deficient number, since it is larger than the sum of its proper divisors (755974715).

30994961593 is an equidigital number, since it uses as much as digits as its factorization.

30994961593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755974714.

The product of its (nonzero) digits is 7085880, while the sum is 58.

The spelling of 30994961593 in words is "thirty billion, nine hundred ninety-four million, nine hundred sixty-one thousand, five hundred ninety-three".