849211690 has 8 divisors (see below), whose sum is σ = 1528581060. Its totient is φ = 339684672.

The previous prime is 849211661. The next prime is 849211691. The reversal of 849211690 is 96112948.

It can be written as a sum of positive squares in 2 ways, for example, as 837928809 + 11282881 = 28947^2 + 3359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×849211690² = 1442320988865312200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (849211691) 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, 42460575 + ... + 42460594.

Almost surely, 2^849211690 is an apocalyptic number.

849211690 is a deficient number, since it is larger than the sum of its proper divisors (679369370).

849211690 is a wasteful number, since it uses less digits than its factorization.

849211690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84921176.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 849211690 is about 29141.2369332532. The cubic root of 849211690 is about 946.9753069932.

The spelling of 849211690 in words is "eight hundred forty-nine million, two hundred eleven thousand, six hundred ninety".