9979949495 has 4 divisors (see below), whose sum is σ = 11975939400. Its totient is φ = 7983959592.

The previous prime is 9979949459. The next prime is 9979949509. The reversal of 9979949495 is 5949499799.

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 9979949495 - 2¹² = 9979945399 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997994945 + ... + 997994954.

It is an arithmetic number, because the mean of its divisors is an integer number (2993984850).

Almost surely, 2^9979949495 is an apocalyptic number.

9979949495 is a deficient number, since it is larger than the sum of its proper divisors (1995989905).

9979949495 is a wasteful number, since it uses less digits than its factorization.

9979949495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995989904.

The product of its digits is 297606960, while the sum is 74.

The square root of 9979949495 is about 99899.6971717132. The cubic root of 9979949495 is about 2152.9938098057.

The spelling of 9979949495 in words is "nine billion, nine hundred seventy-nine million, nine hundred forty-nine thousand, four hundred ninety-five".