1390903 has 2 divisors, whose sum is σ = 1390904. Its totient is φ = 1390902.

The previous prime is 1390901. The next prime is 1390913. The reversal of 1390903 is 3090931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1390903 - 2¹ = 1390901 is a prime.

It is a super-2 number, since 2×1390903² = 3869222310818, which contains 22 as substring.

Together with 1390901, it forms a pair of twin primes.

1390903 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695451 + 695452.

It is an arithmetic number, because the mean of its divisors is an integer number (695452).

2^1390903 is an apocalyptic number.

1390903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390903 is an equidigital number, since it uses as much as digits as its factorization.

1390903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 1390903 is about 1179.3655073810. The cubic root of 1390903 is about 111.6260647915.

The spelling of 1390903 in words is "one million, three hundred ninety thousand, nine hundred three".