30814731697 has 4 divisors (see below), whose sum is σ = 30815090020. Its totient is φ = 30814373376.

The previous prime is 30814731691. The next prime is 30814731821. The reversal of 30814731697 is 79613741803.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 79613741803 = 19 ⋅4190196937.

It can be written as a sum of positive squares in 2 ways, for example, as 12633984801 + 18180746896 = 112401^2 + 134836^2 .

It is a 3-Lehmer number, since φ(30814731697) divides (30814731697-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30814731697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30814731697.

It is not an unprimeable number, because it can be changed into a prime (30814731691) 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, 35833 + ... + 250825.

It is an arithmetic number, because the mean of its divisors is an integer number (7703772505).

It is a Poulet number, since it divides 2^30814731696-1.

Almost surely, 2^30814731697 is an apocalyptic number.

30814731697 is the 143329-th pentagonal number.

It is an amenable number.

30814731697 is a deficient number, since it is larger than the sum of its proper divisors (358323).

30814731697 is a wasteful number, since it uses less digits than its factorization.

30814731697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358322.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 30814731697 in words is "thirty billion, eight hundred fourteen million, seven hundred thirty-one thousand, six hundred ninety-seven".