978835601 has 2 divisors, whose sum is σ = 978835602. Its totient is φ = 978835600.

The previous prime is 978835573. The next prime is 978835603. The reversal of 978835601 is 106538879.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 873793600 + 105042001 = 29560^2 + 10249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978835601 is a prime.

Together with 978835603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978835603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489417800 + 489417801.

It is an arithmetic number, because the mean of its divisors is an integer number (489417801).

Almost surely, 2^978835601 is an apocalyptic number.

It is an amenable number.

978835601 is a deficient number, since it is larger than the sum of its proper divisors (1).

978835601 is an equidigital number, since it uses as much as digits as its factorization.

978835601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 978835601 is about 31286.3484766120. The cubic root of 978835601 is about 992.8948365498.

The spelling of 978835601 in words is "nine hundred seventy-eight million, eight hundred thirty-five thousand, six hundred one".