648712403 has 2 divisors, whose sum is σ = 648712404. Its totient is φ = 648712402.

The previous prime is 648712391. The next prime is 648712409. The reversal of 648712403 is 304217846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 648712403 - 2¹⁴ = 648696019 is a prime.

It is not a weakly prime, because it can be changed into another prime (648712409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324356201 + 324356202.

It is an arithmetic number, because the mean of its divisors is an integer number (324356202).

Almost surely, 2^648712403 is an apocalyptic number.

648712403 is a deficient number, since it is larger than the sum of its proper divisors (1).

648712403 is an equidigital number, since it uses as much as digits as its factorization.

648712403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 648712403 is about 25469.8331953706. The cubic root of 648712403 is about 865.6667442288. Note that the first 3 decimals are identical.

The spelling of 648712403 in words is "six hundred forty-eight million, seven hundred twelve thousand, four hundred three".