30997727686 has 4 divisors (see below), whose sum is σ = 46496591532. Its totient is φ = 15498863842.

The previous prime is 30997727681. The next prime is 30997727729. The reversal of 30997727686 is 68672779903.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30997727681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7749431920 + ... + 7749431923.

It is an arithmetic number, because the mean of its divisors is an integer number (11624147883).

Almost surely, 2^30997727686 is an apocalyptic number.

30997727686 is a deficient number, since it is larger than the sum of its proper divisors (15498863846).

30997727686 is a wasteful number, since it uses less digits than its factorization.

30997727686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15498863845.

The product of its (nonzero) digits is 48009024, while the sum is 64.

The spelling of 30997727686 in words is "thirty billion, nine hundred ninety-seven million, seven hundred twenty-seven thousand, six hundred eighty-six".