1386661934 has 8 divisors (see below), whose sum is σ = 2377134768. Its totient is φ = 594283680.

The previous prime is 1386661931. The next prime is 1386662003. The reversal of 1386661934 is 4391666831.

1386661934 = T₁₉₉₀₁ + T₁₉₉₀₂ + ... + T₁₉₉₀₇.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386661931) 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, 49523627 + ... + 49523654.

It is an arithmetic number, because the mean of its divisors is an integer number (297141846).

Almost surely, 2^1386661934 is an apocalyptic number.

1386661934 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1386661934 is a deficient number, since it is larger than the sum of its proper divisors (990472834).

1386661934 is an equidigital number, since it uses as much as digits as its factorization.

1386661934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99047290.

The product of its digits is 559872, while the sum is 47.

The square root of 1386661934 is about 37237.9099037527. The cubic root of 1386661934 is about 1115.1249456797.

The spelling of 1386661934 in words is "one billion, three hundred eighty-six million, six hundred sixty-one thousand, nine hundred thirty-four".