840626051 has 4 divisors (see below), whose sum is σ = 863345712. Its totient is φ = 817906392.

The previous prime is 840626029. The next prime is 840626053. The reversal of 840626051 is 150626048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840626051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840625999 and 840626017.

It is not an unprimeable number, because it can be changed into a prime (840626053) 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, 11359775 + ... + 11359848.

It is an arithmetic number, because the mean of its divisors is an integer number (215836428).

Almost surely, 2^840626051 is an apocalyptic number.

840626051 is a deficient number, since it is larger than the sum of its proper divisors (22719661).

840626051 is a wasteful number, since it uses less digits than its factorization.

840626051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22719660.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 840626051 is about 28993.5518865833. The cubic root of 840626051 is about 943.7731439670.

The spelling of 840626051 in words is "eight hundred forty million, six hundred twenty-six thousand, fifty-one".