1234540553 has 2 divisors, whose sum is σ = 1234540554. Its totient is φ = 1234540552.

The previous prime is 1234540529. The next prime is 1234540583. The reversal of 1234540553 is 3550454321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798232009 + 436308544 = 28253^2 + 20888^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234540553 - 2⁸ = 1234540297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1234540513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617270276 + 617270277.

It is an arithmetic number, because the mean of its divisors is an integer number (617270277).

Almost surely, 2^1234540553 is an apocalyptic number.

It is an amenable number.

1234540553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234540553 is an equidigital number, since it uses as much as digits as its factorization.

1234540553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 1234540553 is about 35136.0292719596. The cubic root of 1234540553 is about 1072.7580615076.

Adding to 1234540553 its reverse (3550454321), we get a palindrome (4784994874).

The spelling of 1234540553 in words is "one billion, two hundred thirty-four million, five hundred forty thousand, five hundred fifty-three".