849746621 has 4 divisors (see below), whose sum is σ = 849906432. Its totient is φ = 849586812.

The previous prime is 849746617. The next prime is 849746627. The reversal of 849746621 is 126647948.

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 849746621 - 2² = 849746617 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 (849746627) 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, 71645 + ... + 82658.

It is an arithmetic number, because the mean of its divisors is an integer number (212476608).

Almost surely, 2^849746621 is an apocalyptic number.

It is an amenable number.

849746621 is a deficient number, since it is larger than the sum of its proper divisors (159811).

849746621 is a wasteful number, since it uses less digits than its factorization.

849746621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159810.

The product of its digits is 580608, while the sum is 47.

The square root of 849746621 is about 29150.4137363434. The cubic root of 849746621 is about 947.1741031734.

The spelling of 849746621 in words is "eight hundred forty-nine million, seven hundred forty-six thousand, six hundred twenty-one".