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1379 = 7197

1379 has 4 divisors (see below), whose sum is σ = 1584. Its totient is φ = 1176.

The previous prime is 1373. The next prime is 1381. The reversal of 1379 is 9731.

1379 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9731 = 37263.

It is not a de Polignac number, because 1379 - 28 = 1123 is a prime.

It is a pancake number, because a pancake can be divided into 1379 parts by 52 straight cuts.

It is a Duffinian number.

1379 is an undulating number in base 14.

It is the 13-th primeval number, because it sets a new record (31) in the number of distinct primes that is it possible to write using its digits.

It is a plaindrome in base 10.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1379.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92 + ... + 105.

It is an arithmetic number, because the mean of its divisors is an integer number (396).

It is the magic constant of a 14 × 14 magic square.

1379 is a deficient number, since it is larger than the sum of its proper divisors (205).

1379 is an equidigital number, since it uses as much as digits as its factorization.

1379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204.

The product of its digits is 189, while the sum is 20.

The square root of 1379 is about 37.1348892553. The cubic root of 1379 is about 11.1306729473.

The spelling of 1379 in words is "one thousand, three hundred seventy-nine".

Divisors: 1 7 197 1379