993830920951 has 4 divisors (see below), whose sum is σ = 1084179186504. Its totient is φ = 903482655400.

The previous prime is 993830920931. The next prime is 993830920967. The reversal of 993830920951 is 159029038399.

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

It is a cyclic number.

It is not a de Polignac number, because 993830920951 - 2²³ = 993822532343 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 (993830920931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45174132760 + ... + 45174132781.

It is an arithmetic number, because the mean of its divisors is an integer number (271044796626).

Almost surely, 2^993830920951 is an apocalyptic number.

993830920951 is a deficient number, since it is larger than the sum of its proper divisors (90348265553).

993830920951 is a wasteful number, since it uses less digits than its factorization.

993830920951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90348265552.

The product of its (nonzero) digits is 4723920, while the sum is 58.

The spelling of 993830920951 in words is "nine hundred ninety-three billion, eight hundred thirty million, nine hundred twenty thousand, nine hundred fifty-one".