1394907993 has 16 divisors (see below), whose sum is σ = 2067120000. Its totient is φ = 929673360.

The previous prime is 1394907991. The next prime is 1394908001. The reversal of 1394907993 is 3997094931.

It is not a de Polignac number, because 1394907993 - 2¹ = 1394907991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1394907991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150508 + ... + 159506.

It is an arithmetic number, because the mean of its divisors is an integer number (129195000).

Almost surely, 2^1394907993 is an apocalyptic number.

It is an amenable number.

1394907993 is a deficient number, since it is larger than the sum of its proper divisors (672212007).

1394907993 is an equidigital number, since it uses as much as digits as its factorization.

1394907993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14749 (or 14743 counting only the distinct ones).

The product of its (nonzero) digits is 1653372, while the sum is 54.

The square root of 1394907993 is about 37348.4670769765. The cubic root of 1394907993 is about 1117.3310153921.

The spelling of 1394907993 in words is "one billion, three hundred ninety-four million, nine hundred seven thousand, nine hundred ninety-three".