30968990999 has 16 divisors (see below), whose sum is σ = 32092220160. Its totient is φ = 29865084480.

The previous prime is 30968990981. The next prime is 30968991007. The reversal of 30968990999 is 99909986903.

It is a cyclic number.

It is not a de Polignac number, because 30968990999 - 2⁸ = 30968990743 is a prime.

It is a super-2 number, since 2×30968990999² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30968900999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2776664 + ... + 2787794.

It is an arithmetic number, because the mean of its divisors is an integer number (2005763760).

Almost surely, 2^30968990999 is an apocalyptic number.

30968990999 is a deficient number, since it is larger than the sum of its proper divisors (1123229161).

30968990999 is a wasteful number, since it uses less digits than its factorization.

30968990999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11990.

The product of its (nonzero) digits is 76527504, while the sum is 71.

The spelling of 30968990999 in words is "thirty billion, nine hundred sixty-eight million, nine hundred ninety thousand, nine hundred ninety-nine".