1391796668 has 6 divisors (see below), whose sum is σ = 2435644176. Its totient is φ = 695898332.

The previous prime is 1391796661. The next prime is 1391796673. The reversal of 1391796668 is 8666971931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391796661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173974580 + ... + 173974587.

It is an arithmetic number, because the mean of its divisors is an integer number (405940696).

Almost surely, 2^1391796668 is an apocalyptic number.

It is an amenable number.

1391796668 is a deficient number, since it is larger than the sum of its proper divisors (1043847508).

1391796668 is a wasteful number, since it uses less digits than its factorization.

1391796668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347949171 (or 347949169 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 56.

The square root of 1391796668 is about 37306.7911780148. The cubic root of 1391796668 is about 1116.4996659840.

The spelling of 1391796668 in words is "one billion, three hundred ninety-one million, seven hundred ninety-six thousand, six hundred sixty-eight".