978751097 has 2 divisors, whose sum is σ = 978751098. Its totient is φ = 978751096.

The previous prime is 978751093. The next prime is 978751129. The reversal of 978751097 is 790157879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 656333161 + 322417936 = 25619^2 + 17956^2 .

It is a cyclic number.

It is not a de Polignac number, because 978751097 - 2² = 978751093 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978751093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489375548 + 489375549.

It is an arithmetic number, because the mean of its divisors is an integer number (489375549).

Almost surely, 2^978751097 is an apocalyptic number.

It is an amenable number.

978751097 is a deficient number, since it is larger than the sum of its proper divisors (1).

978751097 is an equidigital number, since it uses as much as digits as its factorization.

978751097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1111320, while the sum is 53.

The square root of 978751097 is about 31284.9979542911. The cubic root of 978751097 is about 992.8662631442.

The spelling of 978751097 in words is "nine hundred seventy-eight million, seven hundred fifty-one thousand, ninety-seven".