978707879 has 8 divisors (see below), whose sum is σ = 1034645040. Its totient is φ = 923213376.

The previous prime is 978707857. The next prime is 978707887.

978707879 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978707879 is a prime.

It is a super-2 number, since 2×978707879² = 1915738224833357282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978707819) 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, 106112 + ... + 114965.

It is an arithmetic number, because the mean of its divisors is an integer number (129330630).

Almost surely, 2^978707879 is an apocalyptic number.

978707879 is a deficient number, since it is larger than the sum of its proper divisors (55937161).

978707879 is a wasteful number, since it uses less digits than its factorization.

978707879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221329.

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

The square root of 978707879 is about 31284.3072322211. The cubic root of 978707879 is about 992.8516491714.

The spelling of 978707879 in words is "nine hundred seventy-eight million, seven hundred seven thousand, eight hundred seventy-nine".