1386052691 has 4 divisors (see below), whose sum is σ = 1400341992. Its totient is φ = 1371763392.

The previous prime is 1386052639. The next prime is 1386052741. The reversal of 1386052691 is 1962506831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1386052691 is a prime.

It is a super-2 number, since 2×1386052691² = 3842284124456682962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1386052621) 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, 7144505 + ... + 7144698.

It is an arithmetic number, because the mean of its divisors is an integer number (350085498).

Almost surely, 2^1386052691 is an apocalyptic number.

1386052691 is a deficient number, since it is larger than the sum of its proper divisors (14289301).

1386052691 is an equidigital number, since it uses as much as digits as its factorization.

1386052691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14289300.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 1386052691 is about 37229.7285915436. The cubic root of 1386052691 is about 1114.9616082017.

The spelling of 1386052691 in words is "one billion, three hundred eighty-six million, fifty-two thousand, six hundred ninety-one".