1388683965 has 8 divisors (see below), whose sum is σ = 2221894368. Its totient is φ = 740631440.

The previous prime is 1388683957. The next prime is 1388683973. The reversal of 1388683965 is 5693868831.

It is an interprime number because it is at equal distance from previous prime (1388683957) and next prime (1388683973).

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

It is not a de Polignac number, because 1388683965 - 2³ = 1388683957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46289451 + ... + 46289480.

It is an arithmetic number, because the mean of its divisors is an integer number (277736796).

Almost surely, 2^1388683965 is an apocalyptic number.

1388683965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388683965 is a deficient number, since it is larger than the sum of its proper divisors (833210403).

1388683965 is an equidigital number, since it uses as much as digits as its factorization.

1388683965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92578939.

The product of its digits is 7464960, while the sum is 57.

The square root of 1388683965 is about 37265.0501811013. The cubic root of 1388683965 is about 1115.6667076499. Note that the first 3 decimals are identical.

The spelling of 1388683965 in words is "one billion, three hundred eighty-eight million, six hundred eighty-three thousand, nine hundred sixty-five".