978196903 has 2 divisors, whose sum is σ = 978196904. Its totient is φ = 978196902.

The previous prime is 978196829. The next prime is 978196907. The reversal of 978196903 is 309691879.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978196903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978196907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489098451 + 489098452.

It is an arithmetic number, because the mean of its divisors is an integer number (489098452).

Almost surely, 2^978196903 is an apocalyptic number.

978196903 is a deficient number, since it is larger than the sum of its proper divisors (1).

978196903 is an equidigital number, since it uses as much as digits as its factorization.

978196903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 978196903 is about 31276.1395156116. The cubic root of 978196903 is about 992.6788323072.

The spelling of 978196903 in words is "nine hundred seventy-eight million, one hundred ninety-six thousand, nine hundred three".