1397977 has 8 divisors (see below), whose sum is σ = 1636992. Its totient is φ = 1168800.

The previous prime is 1397959. The next prime is 1397983. The reversal of 1397977 is 7797931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1397977 - 2¹⁹ = 873689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1397177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2149 + ... + 2722.

It is an arithmetic number, because the mean of its divisors is an integer number (204624).

2^1397977 is an apocalyptic number.

It is an amenable number.

1397977 is a deficient number, since it is larger than the sum of its proper divisors (239015).

1397977 is an equidigital number, since it uses as much as digits as its factorization.

1397977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919.

The product of its digits is 83349, while the sum is 43.

The square root of 1397977 is about 1182.3607740449. The cubic root of 1397977 is about 111.8149847160.

The spelling of 1397977 in words is "one million, three hundred ninety-seven thousand, nine hundred seventy-seven".