994128523 has 2 divisors, whose sum is σ = 994128524. Its totient is φ = 994128522.

The previous prime is 994128503. The next prime is 994128539. The reversal of 994128523 is 325821499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 994128523 - 2¹³ = 994120331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 994128523.

It is not a weakly prime, because it can be changed into another prime (994128503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497064261 + 497064262.

It is an arithmetic number, because the mean of its divisors is an integer number (497064262).

Almost surely, 2^994128523 is an apocalyptic number.

994128523 is a deficient number, since it is larger than the sum of its proper divisors (1).

994128523 is an equidigital number, since it uses as much as digits as its factorization.

994128523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 994128523 is about 31529.8037259987. The cubic root of 994128523 is about 998.0389979848.

The spelling of 994128523 in words is "nine hundred ninety-four million, one hundred twenty-eight thousand, five hundred twenty-three".