1379489 has 2 divisors, whose sum is σ = 1379490. Its totient is φ = 1379488.

The previous prime is 1379473. The next prime is 1379491. The reversal of 1379489 is 9849731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 824464 + 555025 = 908^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1379489 - 2⁴ = 1379473 is a prime.

It is a super-2 number, since 2×1379489² = 3805979802242, which contains 22 as substring.

Together with 1379491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1379449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689744 + 689745.

It is an arithmetic number, because the mean of its divisors is an integer number (689745).

2^1379489 is an apocalyptic number.

It is an amenable number.

1379489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1379489 is an equidigital number, since it uses as much as digits as its factorization.

1379489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 1379489 is about 1174.5164962656. The cubic root of 1379489 is about 111.3198845512.

The spelling of 1379489 in words is "one million, three hundred seventy-nine thousand, four hundred eighty-nine".