99972041 has 4 divisors (see below), whose sum is σ = 107662212. Its totient is φ = 92281872.

The previous prime is 99972013. The next prime is 99972043. The reversal of 99972041 is 14027999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14027999 = 23 ⋅609913.

It can be written as a sum of positive squares in 2 ways, for example, as 51265600 + 48706441 = 7160^2 + 6979^2 .

It is a cyclic number.

It is not a de Polignac number, because 99972041 - 2¹⁰ = 99971017 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 99972041.

It is not an unprimeable number, because it can be changed into a prime (99972043) 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, 3845066 + ... + 3845091.

It is an arithmetic number, because the mean of its divisors is an integer number (26915553).

Almost surely, 2^99972041 is an apocalyptic number.

It is an amenable number.

99972041 is a deficient number, since it is larger than the sum of its proper divisors (7690171).

99972041 is a wasteful number, since it uses less digits than its factorization.

99972041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7690170.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 99972041 is about 9998.6019522731. The cubic root of 99972041 is about 464.1156212684.

The spelling of 99972041 in words is "ninety-nine million, nine hundred seventy-two thousand, forty-one".