1398967 has 2 divisors, whose sum is σ = 1398968. Its totient is φ = 1398966.

The previous prime is 1398911. The next prime is 1398973. The reversal of 1398967 is 7698931.

It is a strong prime.

It is an emirp because it is prime and its reverse (7698931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1398967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699483 + 699484.

It is an arithmetic number, because the mean of its divisors is an integer number (699484).

2^1398967 is an apocalyptic number.

1398967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398967 is an equidigital number, since it uses as much as digits as its factorization.

1398967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 1398967 is about 1182.7793538949. The cubic root of 1398967 is about 111.8413730172.

The spelling of 1398967 in words is "one million, three hundred ninety-eight thousand, nine hundred sixty-seven".