978353879 has 2 divisors, whose sum is σ = 978353880. Its totient is φ = 978353878.

The previous prime is 978353869. The next prime is 978353881.

978353879 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 978353879 - 2²⁸ = 709918423 is a prime.

It is a super-4 number, since 4×978353879⁴ (a number of 37 digits) contains 4444 as substring.

It is a Sophie Germain prime.

Together with 978353881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978353809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489176939 + 489176940.

It is an arithmetic number, because the mean of its divisors is an integer number (489176940).

Almost surely, 2^978353879 is an apocalyptic number.

978353879 is a deficient number, since it is larger than the sum of its proper divisors (1).

978353879 is an equidigital number, since it uses as much as digits as its factorization.

978353879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11430720, while the sum is 59.

The square root of 978353879 is about 31278.6489318193. The cubic root of 978353879 is about 992.7319294622.

The spelling of 978353879 in words is "nine hundred seventy-eight million, three hundred fifty-three thousand, eight hundred seventy-nine".