840771459 has 24 divisors (see below), whose sum is σ = 1338525552. Its totient is φ = 504299520.

The previous prime is 840771457. The next prime is 840771469. The reversal of 840771459 is 954177048.

It is a happy number.

It is not a de Polignac number, because 840771459 - 2¹ = 840771457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840771457) 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, 34174 + ... + 53379.

It is an arithmetic number, because the mean of its divisors is an integer number (55771898).

Almost surely, 2^840771459 is an apocalyptic number.

840771459 is a deficient number, since it is larger than the sum of its proper divisors (497754093).

840771459 is a wasteful number, since it uses less digits than its factorization.

840771459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87667 (or 87664 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 840771459 is about 28996.0593701972. The cubic root of 840771459 is about 943.8275574815.

The spelling of 840771459 in words is "eight hundred forty million, seven hundred seventy-one thousand, four hundred fifty-nine".