978005023 has 2 divisors, whose sum is σ = 978005024. Its totient is φ = 978005022.

The previous prime is 978005003. The next prime is 978005033. The reversal of 978005023 is 320500879.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978005023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 978005023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978005003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489002511 + 489002512.

It is an arithmetic number, because the mean of its divisors is an integer number (489002512).

Almost surely, 2^978005023 is an apocalyptic number.

978005023 is a deficient number, since it is larger than the sum of its proper divisors (1).

978005023 is an equidigital number, since it uses as much as digits as its factorization.

978005023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 978005023 is about 31273.0718510350. The cubic root of 978005023 is about 992.6139211530.

The spelling of 978005023 in words is "nine hundred seventy-eight million, five thousand, twenty-three".