1377631 has 8 divisors (see below), whose sum is σ = 1455840. Its totient is φ = 1300992.

The previous prime is 1377601. The next prime is 1377637. The reversal of 1377631 is 1367731.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377631 is a prime.

It is a super-2 number, since 2×1377631² = 3795734344322, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 1377631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377637) 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, 1711 + ... + 2383.

It is an arithmetic number, because the mean of its divisors is an integer number (181980).

2^1377631 is an apocalyptic number.

1377631 is a deficient number, since it is larger than the sum of its proper divisors (78209).

1377631 is an equidigital number, since it uses as much as digits as its factorization.

1377631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785.

The product of its digits is 2646, while the sum is 28.

The square root of 1377631 is about 1173.7252659801. The cubic root of 1377631 is about 111.2698840863.

The spelling of 1377631 in words is "one million, three hundred seventy-seven thousand, six hundred thirty-one".