613623253 has 4 divisors (see below), whose sum is σ = 613681228. Its totient is φ = 613565280.

The previous prime is 613623247. The next prime is 613623289. The reversal of 613623253 is 352326316.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 524547409 + 89075844 = 22903^2 + 9438^2 .

It is a cyclic number.

It is not a de Polignac number, because 613623253 - 2²¹ = 611526101 is a prime.

It is a super-3 number, since 3×613623253³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613623203) 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, 8088 + ... + 35953.

It is an arithmetic number, because the mean of its divisors is an integer number (153420307).

Almost surely, 2^613623253 is an apocalyptic number.

It is an amenable number.

613623253 is a deficient number, since it is larger than the sum of its proper divisors (57975).

613623253 is a wasteful number, since it uses less digits than its factorization.

613623253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57974.

The product of its digits is 19440, while the sum is 31.

The square root of 613623253 is about 24771.4200844441. The cubic root of 613623253 is about 849.7684504238.

Adding to 613623253 its reverse (352326316), we get a palindrome (965949569).

The spelling of 613623253 in words is "six hundred thirteen million, six hundred twenty-three thousand, two hundred fifty-three".