30993651439 has 4 divisors (see below), whose sum is σ = 32816807424. Its totient is φ = 29170495456.

The previous prime is 30993651349. The next prime is 30993651457. The reversal of 30993651439 is 93415639903.

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

It is a cyclic number.

It is not a de Polignac number, because 30993651439 - 2¹¹ = 30993649391 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 (30993651539) 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, 911577967 + ... + 911578000.

It is an arithmetic number, because the mean of its divisors is an integer number (8204201856).

Almost surely, 2^30993651439 is an apocalyptic number.

30993651439 is a deficient number, since it is larger than the sum of its proper divisors (1823155985).

30993651439 is a wasteful number, since it uses less digits than its factorization.

30993651439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823155984.

The product of its (nonzero) digits is 2361960, while the sum is 52.

The spelling of 30993651439 in words is "thirty billion, nine hundred ninety-three million, six hundred fifty-one thousand, four hundred thirty-nine".