849071421 has 24 divisors (see below), whose sum is σ = 1369052256. Its totient is φ = 502619040.

The previous prime is 849071417. The next prime is 849071453. The reversal of 849071421 is 124170948.

849071421 is a `hidden beast` number, since 84 + 90 + 71 + 421 = 666.

It is not a de Polignac number, because 849071421 - 2² = 849071417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849071521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95470 + ... + 103983.

It is an arithmetic number, because the mean of its divisors is an integer number (57043844).

Almost surely, 2^849071421 is an apocalyptic number.

It is an amenable number.

849071421 is a deficient number, since it is larger than the sum of its proper divisors (519980835).

849071421 is a wasteful number, since it uses less digits than its factorization.

849071421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199513 (or 199510 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 849071421 is about 29138.8301240801. The cubic root of 849071421 is about 946.9231650695.

The spelling of 849071421 in words is "eight hundred forty-nine million, seventy-one thousand, four hundred twenty-one".