978807797 has 16 divisors (see below), whose sum is σ = 1105876800. Its totient is φ = 858157440.

The previous prime is 978807773. The next prime is 978807833. The reversal of 978807797 is 797708879.

It is a cyclic number.

It is not a de Polignac number, because 978807797 - 2²⁴ = 962030581 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 (978807707) 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, 512318 + ... + 514224.

It is an arithmetic number, because the mean of its divisors is an integer number (69117300).

Almost surely, 2^978807797 is an apocalyptic number.

It is an amenable number.

978807797 is a deficient number, since it is larger than the sum of its proper divisors (127069003).

978807797 is a wasteful number, since it uses less digits than its factorization.

978807797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 12446784, while the sum is 62.

The square root of 978807797 is about 31285.9041262994. The cubic root of 978807797 is about 992.8854353424.

The spelling of 978807797 in words is "nine hundred seventy-eight million, eight hundred seven thousand, seven hundred ninety-seven".