1397699 has 4 divisors (see below), whose sum is σ = 1401000. Its totient is φ = 1394400.

The previous prime is 1397681. The next prime is 1397717. The reversal of 1397699 is 9967931.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9967931 = 73 ⋅136547.

It is an interprime number because it is at equal distance from previous prime (1397681) and next prime (1397717).

It is a cyclic number.

It is not a de Polignac number, because 1397699 - 2⁸ = 1397443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1397609) 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 3 ways as a sum of consecutive naturals, for example, 902 + ... + 1899.

It is an arithmetic number, because the mean of its divisors is an integer number (350250).

2^1397699 is an apocalyptic number.

1397699 is a deficient number, since it is larger than the sum of its proper divisors (3301).

1397699 is an equidigital number, since it uses as much as digits as its factorization.

1397699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300.

The product of its digits is 91854, while the sum is 44.

The square root of 1397699 is about 1182.2432067895. The cubic root of 1397699 is about 111.8075724275.

It can be divided in two parts, 1397 and 699, that multiplied together give a triangular number (976503 = T₁₃₉₇).

The spelling of 1397699 in words is "one million, three hundred ninety-seven thousand, six hundred ninety-nine".