909897541 has 4 divisors (see below), whose sum is σ = 1039882912. Its totient is φ = 779912172.

The previous prime is 909897529. The next prime is 909897557. The reversal of 909897541 is 145798909.

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, and also an emirpimes, since its reverse is a distinct semiprime: 145798909 = 23 ⋅6339083.

It is a cyclic number.

It is not a de Polignac number, because 909897541 - 2⁷ = 909897413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909897041) 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 3 ways as a sum of consecutive naturals, for example, 64992675 + ... + 64992688.

It is an arithmetic number, because the mean of its divisors is an integer number (259970728).

Almost surely, 2^909897541 is an apocalyptic number.

It is an amenable number.

909897541 is a deficient number, since it is larger than the sum of its proper divisors (129985371).

909897541 is a wasteful number, since it uses less digits than its factorization.

909897541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129985370.

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 909897541 is about 30164.5079688033. The cubic root of 909897541 is about 969.0157377072.

The spelling of 909897541 in words is "nine hundred nine million, eight hundred ninety-seven thousand, five hundred forty-one".