978494093 has 2 divisors, whose sum is σ = 978494094. Its totient is φ = 978494092.

The previous prime is 978494087. The next prime is 978494113. The reversal of 978494093 is 390494879.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 887920804 + 90573289 = 29798^2 + 9517^2 .

It is a cyclic number.

It is not a de Polignac number, because 978494093 - 2⁶ = 978494029 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978454093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489247046 + 489247047.

It is an arithmetic number, because the mean of its divisors is an integer number (489247047).

Almost surely, 2^978494093 is an apocalyptic number.

It is an amenable number.

978494093 is a deficient number, since it is larger than the sum of its proper divisors (1).

978494093 is an equidigital number, since it uses as much as digits as its factorization.

978494093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 978494093 is about 31280.8902207082. The cubic root of 978494093 is about 992.7793520662.

The spelling of 978494093 in words is "nine hundred seventy-eight million, four hundred ninety-four thousand, ninety-three".