978779079 has 16 divisors (see below), whose sum is σ = 1452605440. Its totient is φ = 651366360.

The previous prime is 978779071. The next prime is 978779147. The reversal of 978779079 is 970977879.

It is not a de Polignac number, because 978779079 - 2³ = 978779071 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 (978779071) 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, 16327 + ... + 47160.

It is an arithmetic number, because the mean of its divisors is an integer number (90787840).

Almost surely, 2^978779079 is an apocalyptic number.

978779079 is a deficient number, since it is larger than the sum of its proper divisors (473826361).

978779079 is a wasteful number, since it uses less digits than its factorization.

978779079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64067 (or 64061 counting only the distinct ones).

The product of its (nonzero) digits is 14002632, while the sum is 63.

The square root of 978779079 is about 31285.4451622476. The cubic root of 978779079 is about 992.8757249026.

The spelling of 978779079 in words is "nine hundred seventy-eight million, seven hundred seventy-nine thousand, seventy-nine".