1379731 has 4 divisors (see below), whose sum is σ = 1400392. Its totient is φ = 1359072.

The previous prime is 1379699. The next prime is 1379753.

1379731 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1379731 - 2⁵ = 1379699 is a prime.

It is a super-2 number, since 2×1379731² = 3807315264722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1379693 and 1379702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1371731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10230 + ... + 10363.

It is an arithmetic number, because the mean of its divisors is an integer number (350098).

2^1379731 is an apocalyptic number.

1379731 is a deficient number, since it is larger than the sum of its proper divisors (20661).

1379731 is an equidigital number, since it uses as much as digits as its factorization.

1379731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20660.

The product of its digits is 3969, while the sum is 31.

The square root of 1379731 is about 1174.6195128636. The cubic root of 1379731 is about 111.3263936854.

The spelling of 1379731 in words is "one million, three hundred seventy-nine thousand, seven hundred thirty-one".