649403 has 2 divisors, whose sum is σ = 649404. Its totient is φ = 649402.

The previous prime is 649381. The next prime is 649421. The reversal of 649403 is 304946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 649403 - 2⁸ = 649147 is a prime.

It is not a weakly prime, because it can be changed into another prime (649423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324701 + 324702.

It is an arithmetic number, because the mean of its divisors is an integer number (324702).

2⁶⁴⁹⁴⁰³ is an apocalyptic number.

649403 is a deficient number, since it is larger than the sum of its proper divisors (1).

649403 is an equidigital number, since it uses as much as digits as its factorization.

649403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 649403 is about 805.8554460944. The cubic root of 649403 is about 86.5973821673.

The spelling of 649403 in words is "six hundred forty-nine thousand, four hundred three".