991700054 has 8 divisors (see below), whose sum is σ = 1490806488. Its totient is φ = 494764560.

The previous prime is 991700029. The next prime is 991700063. The reversal of 991700054 is 450007199.

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

It is a junction number, because it is equal to n+sod(n) for n = 991699987 and 991700023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541592 + ... + 543419.

It is an arithmetic number, because the mean of its divisors is an integer number (186350811).

Almost surely, 2^991700054 is an apocalyptic number.

991700054 is a deficient number, since it is larger than the sum of its proper divisors (499106434).

991700054 is a wasteful number, since it uses less digits than its factorization.

991700054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085470.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 991700054 is about 31491.2694885424. The cubic root of 991700054 is about 997.2256614972.

The spelling of 991700054 in words is "nine hundred ninety-one million, seven hundred thousand, fifty-four".