999950393 has 4 divisors (see below), whose sum is σ = 1076869668. Its totient is φ = 923031120.

The previous prime is 999950383. The next prime is 999950407. The reversal of 999950393 is 393059999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 393059999 = 877 ⋅448187.

It can be written as a sum of positive squares in 2 ways, for example, as 601868089 + 398082304 = 24533^2 + 19952^2 .

It is a cyclic number.

It is not a de Polignac number, because 999950393 - 2⁴ = 999950377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (999950383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38459618 + ... + 38459643.

It is an arithmetic number, because the mean of its divisors is an integer number (269217417).

Almost surely, 2^999950393 is an apocalyptic number.

It is an amenable number.

999950393 is a deficient number, since it is larger than the sum of its proper divisors (76919275).

999950393 is a wasteful number, since it uses less digits than its factorization.

999950393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76919274.

The product of its (nonzero) digits is 2657205, while the sum is 56.

The square root of 999950393 is about 31621.9922364167. The cubic root of 999950393 is about 999.9834640599.

The spelling of 999950393 in words is "nine hundred ninety-nine million, nine hundred fifty thousand, three hundred ninety-three".