1391479 has 2 divisors, whose sum is σ = 1391480. Its totient is φ = 1391478.

The previous prime is 1391461. The next prime is 1391483. The reversal of 1391479 is 9741931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1391479 - 2⁵ = 1391447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1391419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695739 + 695740.

It is an arithmetic number, because the mean of its divisors is an integer number (695740).

2^1391479 is an apocalyptic number.

1391479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391479 is an equidigital number, since it uses as much as digits as its factorization.

1391479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 34.

The square root of 1391479 is about 1179.6096812082. The cubic root of 1391479 is about 111.6414715068.

The spelling of 1391479 in words is "one million, three hundred ninety-one thousand, four hundred seventy-nine".