840254473 has 8 divisors (see below), whose sum is σ = 868340736. Its totient is φ = 812229600.

The previous prime is 840254413. The next prime is 840254477. The reversal of 840254473 is 374452048.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840254473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840254477) 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, 13365 + ... + 43117.

It is an arithmetic number, because the mean of its divisors is an integer number (108542592).

Almost surely, 2^840254473 is an apocalyptic number.

It is an amenable number.

840254473 is a deficient number, since it is larger than the sum of its proper divisors (28086263).

840254473 is a wasteful number, since it uses less digits than its factorization.

840254473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30695.

The product of its (nonzero) digits is 107520, while the sum is 37.

The square root of 840254473 is about 28987.1432362694. The cubic root of 840254473 is about 943.6340662641.

The spelling of 840254473 in words is "eight hundred forty million, two hundred fifty-four thousand, four hundred seventy-three".