899145541997 has 4 divisors (see below), whose sum is σ = 904661772480. Its totient is φ = 893629311516.

The previous prime is 899145541969. The next prime is 899145542003. The reversal of 899145541997 is 799145541998.

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 899145541997 - 2²⁸ = 898877106541 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 899145541997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899145541597) 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, 2758114997 + ... + 2758115322.

It is an arithmetic number, because the mean of its divisors is an integer number (226165443120).

Almost surely, 2^899145541997 is an apocalyptic number.

It is an amenable number.

899145541997 is a deficient number, since it is larger than the sum of its proper divisors (5516230483).

899145541997 is a wasteful number, since it uses less digits than its factorization.

899145541997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5516230482.

The product of its digits is 146966400, while the sum is 71.

Subtracting from 899145541997 its reverse (799145541998), we obtain a palindrome (99999999999).

The spelling of 899145541997 in words is "eight hundred ninety-nine billion, one hundred forty-five million, five hundred forty-one thousand, nine hundred ninety-seven".