840419961 has 8 divisors (see below), whose sum is σ = 1150845504. Its totient is φ = 545137200.

The previous prime is 840419953. The next prime is 840419999. The reversal of 840419961 is 169914048.

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

It is not a de Polignac number, because 840419961 - 2³ = 840419953 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (840419911) 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, 3785565 + ... + 3785786.

It is an arithmetic number, because the mean of its divisors is an integer number (143855688).

Almost surely, 2^840419961 is an apocalyptic number.

It is an amenable number.

840419961 is a deficient number, since it is larger than the sum of its proper divisors (310425543).

840419961 is a wasteful number, since it uses less digits than its factorization.

840419961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7571391.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 840419961 is about 28989.9976026215. The cubic root of 840419961 is about 943.6960117297.

The spelling of 840419961 in words is "eight hundred forty million, four hundred nineteen thousand, nine hundred sixty-one".