612540263 has 2 divisors, whose sum is σ = 612540264. Its totient is φ = 612540262.

The previous prime is 612540251. The next prime is 612540281. The reversal of 612540263 is 362045216.

612540263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 612540263 - 2¹⁸ = 612278119 is a prime.

It is a super-2 number, since 2×612540263² = 750411147592218338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612540763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306270131 + 306270132.

It is an arithmetic number, because the mean of its divisors is an integer number (306270132).

Almost surely, 2^612540263 is an apocalyptic number.

612540263 is a deficient number, since it is larger than the sum of its proper divisors (1).

612540263 is an equidigital number, since it uses as much as digits as its factorization.

612540263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 612540263 is about 24749.5507635997. The cubic root of 612540263 is about 849.2682343323.

Adding to 612540263 its reverse (362045216), we get a palindrome (974585479).

The spelling of 612540263 in words is "six hundred twelve million, five hundred forty thousand, two hundred sixty-three".