1399477 has 2 divisors, whose sum is σ = 1399478. Its totient is φ = 1399476.

The previous prime is 1399471. The next prime is 1399493. The reversal of 1399477 is 7749931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703921 + 695556 = 839^2 + 834^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399477 - 2³ = 1399469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699738 + 699739.

It is an arithmetic number, because the mean of its divisors is an integer number (699739).

2^1399477 is an apocalyptic number.

It is an amenable number.

1399477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399477 is an equidigital number, since it uses as much as digits as its factorization.

1399477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 40.

The square root of 1399477 is about 1182.9949281379. The cubic root of 1399477 is about 111.8549621322.

The spelling of 1399477 in words is "one million, three hundred ninety-nine thousand, four hundred seventy-seven".