1384666957 has 4 divisors (see below), whose sum is σ = 1405333696. Its totient is φ = 1364000220.

The previous prime is 1384666919. The next prime is 1384666963. The reversal of 1384666957 is 7596664831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7596664831 = 7 ⋅1085237833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1384666957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1384666898 and 1384666907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1384666357) 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, 10333269 + ... + 10333402.

It is an arithmetic number, because the mean of its divisors is an integer number (351333424).

Almost surely, 2^1384666957 is an apocalyptic number.

It is an amenable number.

1384666957 is a deficient number, since it is larger than the sum of its proper divisors (20666739).

1384666957 is an equidigital number, since it uses as much as digits as its factorization.

1384666957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20666738.

The product of its digits is 6531840, while the sum is 55.

The square root of 1384666957 is about 37211.1133534056. The cubic root of 1384666957 is about 1114.5899158891.

The spelling of 1384666957 in words is "one billion, three hundred eighty-four million, six hundred sixty-six thousand, nine hundred fifty-seven".