1993017993 has 8 divisors (see below), whose sum is σ = 2743078656. Its totient is φ = 1285818000.

The previous prime is 1993017973. The next prime is 1993018003. The reversal of 1993017993 is 3997103991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1993017993 - 2²⁰ = 1991969417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1993017973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10715058 + ... + 10715243.

It is an arithmetic number, because the mean of its divisors is an integer number (342884832).

Almost surely, 2^1993017993 is an apocalyptic number.

It is an amenable number.

1993017993 is a deficient number, since it is larger than the sum of its proper divisors (750060663).

1993017993 is a wasteful number, since it uses less digits than its factorization.

1993017993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21430335.

The product of its (nonzero) digits is 413343, while the sum is 51.

The square root of 1993017993 is about 44643.2300914708. The cubic root of 1993017993 is about 1258.4532108921.

The spelling of 1993017993 in words is "one billion, nine hundred ninety-three million, seventeen thousand, nine hundred ninety-three".