7213903 has 2 divisors, whose sum is σ = 7213904. Its totient is φ = 7213902.

The previous prime is 7213897. The next prime is 7213919. The reversal of 7213903 is 3093127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7213903 - 2⁹ = 7213391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7213303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606951 + 3606952.

It is an arithmetic number, because the mean of its divisors is an integer number (3606952).

Almost surely, 2^7213903 is an apocalyptic number.

7213903 is a deficient number, since it is larger than the sum of its proper divisors (1).

7213903 is an equidigital number, since it uses as much as digits as its factorization.

7213903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 7213903 is about 2685.8709946682. The cubic root of 7213903 is about 193.2220858862. Note that the first 3 decimals are identical.

It can be divided in two parts, 721 and 3903, that added together give a square (4624 = 68²).

The spelling of 7213903 in words is "seven million, two hundred thirteen thousand, nine hundred three".