999925393 has 2 divisors, whose sum is σ = 999925394. Its totient is φ = 999925392.

The previous prime is 999925337. The next prime is 999925411. The reversal of 999925393 is 393529999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 889948224 + 109977169 = 29832^2 + 10487^2 .

It is an emirp because it is prime and its reverse (393529999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999925393 is a prime.

It is not a weakly prime, because it can be changed into another prime (999925313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499962696 + 499962697.

It is an arithmetic number, because the mean of its divisors is an integer number (499962697).

Almost surely, 2^999925393 is an apocalyptic number.

It is an amenable number.

999925393 is a deficient number, since it is larger than the sum of its proper divisors (1).

999925393 is an equidigital number, since it uses as much as digits as its factorization.

999925393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5314410, while the sum is 58.

The square root of 999925393 is about 31621.5969394337. The cubic root of 999925393 is about 999.9751303815.

The spelling of 999925393 in words is "nine hundred ninety-nine million, nine hundred twenty-five thousand, three hundred ninety-three".