840626053 has 2 divisors, whose sum is σ = 840626054. Its totient is φ = 840626052.

The previous prime is 840626029. The next prime is 840626069. The reversal of 840626053 is 350626048.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440706049 + 399920004 = 20993^2 + 19998^2 .

It is a cyclic number.

It is not a de Polignac number, because 840626053 - 2¹⁷ = 840494981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840626023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420313026 + 420313027.

It is an arithmetic number, because the mean of its divisors is an integer number (420313027).

Almost surely, 2^840626053 is an apocalyptic number.

It is an amenable number.

840626053 is a deficient number, since it is larger than the sum of its proper divisors (1).

840626053 is an equidigital number, since it uses as much as digits as its factorization.

840626053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 840626053 is about 28993.5519210738. The cubic root of 840626053 is about 943.7731447155.

The spelling of 840626053 in words is "eight hundred forty million, six hundred twenty-six thousand, fifty-three".