13400903 has 2 divisors, whose sum is σ = 13400904. Its totient is φ = 13400902.

The previous prime is 13400887. The next prime is 13400921. The reversal of 13400903 is 30900431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13400903 - 2⁴ = 13400887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13400923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700451 + 6700452.

It is an arithmetic number, because the mean of its divisors is an integer number (6700452).

Almost surely, 2^13400903 is an apocalyptic number.

13400903 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400903 is an equidigital number, since it uses as much as digits as its factorization.

13400903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 13400903 is about 3660.7243818676. The cubic root of 13400903 is about 237.5261090410.

The spelling of 13400903 in words is "thirteen million, four hundred thousand, nine hundred three".