1394306661 has 16 divisors (see below), whose sum is σ = 2046035520. Its totient is φ = 837553920.

The previous prime is 1394306657. The next prime is 1394306681. The reversal of 1394306661 is 1666034931.

It is not a de Polignac number, because 1394306661 - 2² = 1394306657 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394306681) 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 in 15 ways as a sum of consecutive naturals, for example, 183226 + ... + 190683.

It is an arithmetic number, because the mean of its divisors is an integer number (127877220).

Almost surely, 2^1394306661 is an apocalyptic number.

1394306661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1394306661 is a deficient number, since it is larger than the sum of its proper divisors (651728859).

1394306661 is a wasteful number, since it uses less digits than its factorization.

1394306661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374036.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 1394306661 is about 37340.4159189477. The cubic root of 1394306661 is about 1117.1704352753.

The spelling of 1394306661 in words is "one billion, three hundred ninety-four million, three hundred six thousand, six hundred sixty-one".