1391338741 has 8 divisors (see below), whose sum is σ = 1498715064. Its totient is φ = 1284012480.

The previous prime is 1391338723. The next prime is 1391338801. The reversal of 1391338741 is 1478331931.

It can be written as a sum of positive squares in 4 ways, for example, as 257602500 + 1133736241 = 16050^2 + 33671^2 .

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-1391338741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1391338694 and 1391338703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391335741) 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 7 ways as a sum of consecutive naturals, for example, 61431 + ... + 80971.

It is an arithmetic number, because the mean of its divisors is an integer number (187339383).

Almost surely, 2^1391338741 is an apocalyptic number.

It is an amenable number.

1391338741 is a deficient number, since it is larger than the sum of its proper divisors (107376323).

1391338741 is a wasteful number, since it uses less digits than its factorization.

1391338741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25031.

The product of its digits is 54432, while the sum is 40.

The square root of 1391338741 is about 37300.6533588890. The cubic root of 1391338741 is about 1116.3772028307.

The spelling of 1391338741 in words is "one billion, three hundred ninety-one million, three hundred thirty-eight thousand, seven hundred forty-one".