999253 has 4 divisors (see below), whose sum is σ = 1033740. Its totient is φ = 964768.

The previous prime is 999239. The next prime is 999269. The reversal of 999253 is 352999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352999 = 83 ⋅4253.

It can be written as a sum of positive squares in 2 ways, for example, as 580644 + 418609 = 762^2 + 647^2 .

It is a cyclic number.

It is not a de Polignac number, because 999253 - 2⁵ = 999221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999233) 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, 17200 + ... + 17257.

It is an arithmetic number, because the mean of its divisors is an integer number (258435).

2⁹⁹⁹²⁵³ is an apocalyptic number.

It is an amenable number.

999253 is a deficient number, since it is larger than the sum of its proper divisors (34487).

999253 is a wasteful number, since it uses less digits than its factorization.

999253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34486.

The product of its digits is 21870, while the sum is 37.

The square root of 999253 is about 999.6264302228. The cubic root of 999253 is about 99.9750937973.

The spelling of 999253 in words is "nine hundred ninety-nine thousand, two hundred fifty-three".