253400623 has 32 divisors (see below), whose sum is σ = 317011968. Its totient is φ = 197606400.

The previous prime is 253400611. The next prime is 253400627. The reversal of 253400623 is 326004352.

253400623 = 302² + 303² + ... + 923².

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 253400623 - 2²¹ = 251303471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253400627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 814638 + ... + 814948.

It is an arithmetic number, because the mean of its divisors is an integer number (9906624).

Almost surely, 2^253400623 is an apocalyptic number.

253400623 is a deficient number, since it is larger than the sum of its proper divisors (63611345).

253400623 is a wasteful number, since it uses less digits than its factorization.

253400623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 253400623 is about 15918.5622152253. The cubic root of 253400623 is about 632.8040151396.

Adding to 253400623 its reverse (326004352), we get a palindrome (579404975).

The spelling of 253400623 in words is "two hundred fifty-three million, four hundred thousand, six hundred twenty-three".