648672403 has 2 divisors, whose sum is σ = 648672404. Its totient is φ = 648672402.

The previous prime is 648672389. The next prime is 648672443. The reversal of 648672403 is 304276846.

It is a happy number.

It is an a-pointer prime, because the next prime (648672443) can be obtained adding 648672403 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648672403 is a prime.

It is not a weakly prime, because it can be changed into another prime (648672443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324336201 + 324336202.

It is an arithmetic number, because the mean of its divisors is an integer number (324336202).

Almost surely, 2^648672403 is an apocalyptic number.

648672403 is a deficient number, since it is larger than the sum of its proper divisors (1).

648672403 is an equidigital number, since it uses as much as digits as its factorization.

648672403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 648672403 is about 25469.0479405886. The cubic root of 648672403 is about 865.6489513511.

The spelling of 648672403 in words is "six hundred forty-eight million, six hundred seventy-two thousand, four hundred three".