1993464639 has 12 divisors (see below), whose sum is σ = 2897791416. Its totient is φ = 1320510672.

The previous prime is 1993464607. The next prime is 1993464643. The reversal of 1993464639 is 9364643991.

It is not a de Polignac number, because 1993464639 - 2⁵ = 1993464607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1993464679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 703989 + ... + 706814.

It is an arithmetic number, because the mean of its divisors is an integer number (241482618).

Almost surely, 2^1993464639 is an apocalyptic number.

1993464639 is a deficient number, since it is larger than the sum of its proper divisors (904326777).

1993464639 is a wasteful number, since it uses less digits than its factorization.

1993464639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410966 (or 1410963 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The square root of 1993464639 is about 44648.2322046461. The cubic root of 1993464639 is about 1258.5472125706.

The spelling of 1993464639 in words is "one billion, nine hundred ninety-three million, four hundred sixty-four thousand, six hundred thirty-nine".