213397903 has 2 divisors, whose sum is σ = 213397904. Its totient is φ = 213397902.

The previous prime is 213397871. The next prime is 213397909. The reversal of 213397903 is 309793312.

213397903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213397903 - 2⁵ = 213397871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213397909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106698951 + 106698952.

It is an arithmetic number, because the mean of its divisors is an integer number (106698952).

Almost surely, 2^213397903 is an apocalyptic number.

213397903 is a deficient number, since it is larger than the sum of its proper divisors (1).

213397903 is an equidigital number, since it uses as much as digits as its factorization.

213397903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 37.

The square root of 213397903 is about 14608.1450910100. The cubic root of 213397903 is about 597.5809107122.

The spelling of 213397903 in words is "two hundred thirteen million, three hundred ninety-seven thousand, nine hundred three".