847999090 has 16 divisors (see below), whose sum is σ = 1529406360. Its totient is φ = 338531200.

The previous prime is 847999043. The next prime is 847999091. The reversal of 847999090 is 90999748.

It can be written as a sum of positive squares in 4 ways, for example, as 785288529 + 62710561 = 28023^2 + 7919^2 .

It is not an unprimeable number, because it can be changed into a prime (847999091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78211 + ... + 88390.

Almost surely, 2^847999090 is an apocalyptic number.

847999090 is a deficient number, since it is larger than the sum of its proper divisors (681407270).

847999090 is a wasteful number, since it uses less digits than its factorization.

847999090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167117.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The square root of 847999090 is about 29120.4239323537. The cubic root of 847999090 is about 946.5243596565.

It can be divided in two parts, 847 and 999090, that multiplied together give a triangular number (846229230 = T₄₁₁₃₉).

The spelling of 847999090 in words is "eight hundred forty-seven million, nine hundred ninety-nine thousand, ninety".