993913963 has 4 divisors (see below), whose sum is σ = 1135901680. Its totient is φ = 851926248.

The previous prime is 993913957. The next prime is 993913981. The reversal of 993913963 is 369319399.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 369319399 = 31 ⋅11913529.

It is a cyclic number.

It is not a de Polignac number, because 993913963 - 2¹⁷ = 993782891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 993913963.

It is not an unprimeable number, because it can be changed into a prime (993913903) 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, 70993848 + ... + 70993861.

It is an arithmetic number, because the mean of its divisors is an integer number (283975420).

Almost surely, 2^993913963 is an apocalyptic number.

993913963 is a deficient number, since it is larger than the sum of its proper divisors (141987717).

993913963 is a wasteful number, since it uses less digits than its factorization.

993913963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141987716.

The product of its digits is 1062882, while the sum is 52.

The square root of 993913963 is about 31526.4010473761. The cubic root of 993913963 is about 997.9671914896.

The spelling of 993913963 in words is "nine hundred ninety-three million, nine hundred thirteen thousand, nine hundred sixty-three".