99971043 has 16 divisors (see below), whose sum is σ = 134701056. Its totient is φ = 65948480.

The previous prime is 99971023. The next prime is 99971051. The reversal of 99971043 is 34017999.

It is a cyclic number.

It is not a de Polignac number, because 99971043 - 2⁶ = 99970979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99970986 and 99971004.

It is not an unprimeable number, because it can be changed into a prime (99971023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191623 + ... + 192143.

It is an arithmetic number, because the mean of its divisors is an integer number (8418816).

Almost surely, 2^99971043 is an apocalyptic number.

99971043 is a deficient number, since it is larger than the sum of its proper divisors (34730013).

99971043 is a wasteful number, since it uses less digits than its factorization.

99971043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 99971043 is about 9998.5520451713. The cubic root of 99971043 is about 464.1140768735.

The spelling of 99971043 in words is "ninety-nine million, nine hundred seventy-one thousand, forty-three".