849691541 has 4 divisors (see below), whose sum is σ = 850038432. Its totient is φ = 849344652.

The previous prime is 849691523. The next prime is 849691543. The reversal of 849691541 is 145196948.

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 849691541 - 2¹⁴ = 849675157 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 (849691543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169745 + ... + 174678.

It is an arithmetic number, because the mean of its divisors is an integer number (212509608).

Almost surely, 2^849691541 is an apocalyptic number.

It is an amenable number.

849691541 is a deficient number, since it is larger than the sum of its proper divisors (346891).

849691541 is a wasteful number, since it uses less digits than its factorization.

849691541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346890.

The product of its digits is 311040, while the sum is 47.

The square root of 849691541 is about 29149.4689660035. The cubic root of 849691541 is about 947.1536376701.

The spelling of 849691541 in words is "eight hundred forty-nine million, six hundred ninety-one thousand, five hundred forty-one".