991934753 has 4 divisors (see below), whose sum is σ = 992140848. Its totient is φ = 991728660.

The previous prime is 991934693. The next prime is 991934773. The reversal of 991934753 is 357439199.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 991934753 - 2²² = 987740449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (991934773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95651 + ... + 105512.

It is an arithmetic number, because the mean of its divisors is an integer number (248035212).

Almost surely, 2^991934753 is an apocalyptic number.

It is an amenable number.

991934753 is a deficient number, since it is larger than the sum of its proper divisors (206095).

991934753 is a wasteful number, since it uses less digits than its factorization.

991934753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206094.

The product of its digits is 918540, while the sum is 50.

The square root of 991934753 is about 31494.9956818540. The cubic root of 991934753 is about 997.3043241948.

The spelling of 991934753 in words is "nine hundred ninety-one million, nine hundred thirty-four thousand, seven hundred fifty-three".