1391412677 has 4 divisors (see below), whose sum is σ = 1395541836. Its totient is φ = 1387283520.

The previous prime is 1391412647. The next prime is 1391412679. The reversal of 1391412677 is 7762141931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1003559041 + 387853636 = 31679^2 + 19694^2 .

It is a cyclic number.

It is not a de Polignac number, because 1391412677 - 2¹⁶ = 1391347141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391412679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064074 + ... + 2064747.

It is an arithmetic number, because the mean of its divisors is an integer number (348885459).

Almost surely, 2^1391412677 is an apocalyptic number.

It is an amenable number.

1391412677 is a deficient number, since it is larger than the sum of its proper divisors (4129159).

1391412677 is an equidigital number, since it uses as much as digits as its factorization.

1391412677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129158.

The product of its digits is 63504, while the sum is 41.

The square root of 1391412677 is about 37301.6444275584. The cubic root of 1391412677 is about 1116.3969773113.

The spelling of 1391412677 in words is "one billion, three hundred ninety-one million, four hundred twelve thousand, six hundred seventy-seven".