1396667684 has 6 divisors (see below), whose sum is σ = 2444168454. Its totient is φ = 698333840.

The previous prime is 1396667677. The next prime is 1396667687. The reversal of 1396667684 is 4867666931.

It can be written as a sum of positive squares in only one way, i.e., 1265794084 + 130873600 = 35578^2 + 11440^2 .

It is not an unprimeable number, because it can be changed into a prime (1396667687) 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 as a sum of consecutive naturals, namely, 174583457 + ... + 174583464.

It is an arithmetic number, because the mean of its divisors is an integer number (407361409).

Almost surely, 2^1396667684 is an apocalyptic number.

It is an amenable number.

1396667684 is a deficient number, since it is larger than the sum of its proper divisors (1047500770).

1396667684 is a wasteful number, since it uses less digits than its factorization.

1396667684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349166925 (or 349166923 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 56.

The square root of 1396667684 is about 37372.0173926964. The cubic root of 1396667684 is about 1117.8006595418.

The spelling of 1396667684 in words is "one billion, three hundred ninety-six million, six hundred sixty-seven thousand, six hundred eighty-four".