30978981739 has 8 divisors (see below), whose sum is σ = 31302252800. Its totient is φ = 30656143656.

The previous prime is 30978981713. The next prime is 30978981751. The reversal of 30978981739 is 93718987903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30978981739 - 2¹³ = 30978973547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30978981239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36604 + ... + 251590.

It is an arithmetic number, because the mean of its divisors is an integer number (3912781600).

Almost surely, 2^30978981739 is an apocalyptic number.

30978981739 is a deficient number, since it is larger than the sum of its proper divisors (323271061).

30978981739 is a wasteful number, since it uses less digits than its factorization.

30978981739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216489.

The product of its (nonzero) digits is 20575296, while the sum is 64.

The spelling of 30978981739 in words is "thirty billion, nine hundred seventy-eight million, nine hundred eighty-one thousand, seven hundred thirty-nine".