30945953693 has 4 divisors (see below), whose sum is σ = 30947655840. Its totient is φ = 30944251548.

The previous prime is 30945953611. The next prime is 30945953743. The reversal of 30945953693 is 39635954903.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39635954903 = 17 ⋅2331526759.

It is a cyclic number.

It is not a de Polignac number, because 30945953693 - 2¹⁶ = 30945888157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30945953603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 823505 + ... + 860262.

It is an arithmetic number, because the mean of its divisors is an integer number (7736913960).

Almost surely, 2^30945953693 is an apocalyptic number.

It is an amenable number.

30945953693 is a deficient number, since it is larger than the sum of its proper divisors (1702147).

30945953693 is a wasteful number, since it uses less digits than its factorization.

30945953693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702146.

The product of its (nonzero) digits is 11809800, while the sum is 56.

The spelling of 30945953693 in words is "thirty billion, nine hundred forty-five million, nine hundred fifty-three thousand, six hundred ninety-three".