252403493 has 4 divisors (see below), whose sum is σ = 252951468. Its totient is φ = 251855520.

The previous prime is 252403453. The next prime is 252403531. The reversal of 252403493 is 394304252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79691329 + 172712164 = 8927^2 + 13142^2 .

It is a cyclic number.

It is not a de Polignac number, because 252403493 - 2¹⁶ = 252337957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252403423) 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, 273296 + ... + 274217.

It is an arithmetic number, because the mean of its divisors is an integer number (63237867).

Almost surely, 2^252403493 is an apocalyptic number.

It is an amenable number.

252403493 is a deficient number, since it is larger than the sum of its proper divisors (547975).

252403493 is an equidigital number, since it uses as much as digits as its factorization.

252403493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547974.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 252403493 is about 15887.2116181538. The cubic root of 252403493 is about 631.9728973115.

The spelling of 252403493 in words is "two hundred fifty-two million, four hundred three thousand, four hundred ninety-three".