1394491943 has 4 divisors (see below), whose sum is σ = 1501760568. Its totient is φ = 1287223320.

The previous prime is 1394491937. The next prime is 1394491949. The reversal of 1394491943 is 3491944931.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1394491937) and next prime (1394491949).

It is a cyclic number.

It is not a de Polignac number, because 1394491943 - 2¹⁰ = 1394490919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1394491949) 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, 53634293 + ... + 53634318.

It is an arithmetic number, because the mean of its divisors is an integer number (375440142).

Almost surely, 2^1394491943 is an apocalyptic number.

1394491943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1394491943 is a deficient number, since it is larger than the sum of its proper divisors (107268625).

1394491943 is a wasteful number, since it uses less digits than its factorization.

1394491943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107268624.

The product of its digits is 419904, while the sum is 47.

The square root of 1394491943 is about 37342.8968212162. The cubic root of 1394491943 is about 1117.2199180303.

The spelling of 1394491943 in words is "one billion, three hundred ninety-four million, four hundred ninety-one thousand, nine hundred forty-three".