626071493 has 4 divisors (see below), whose sum is σ = 626645388. Its totient is φ = 625497600.

The previous prime is 626071471. The next prime is 626071499. The reversal of 626071493 is 394170626.

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

It can be written as a sum of positive squares in 2 ways, for example, as 357701569 + 268369924 = 18913^2 + 16382^2 .

It is a cyclic number.

It is not a de Polignac number, because 626071493 - 2²⁴ = 609294277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626071499) 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, 285308 + ... + 287493.

It is an arithmetic number, because the mean of its divisors is an integer number (156661347).

Almost surely, 2^626071493 is an apocalyptic number.

It is an amenable number.

626071493 is a deficient number, since it is larger than the sum of its proper divisors (573895).

626071493 is a wasteful number, since it uses less digits than its factorization.

626071493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573894.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 626071493 is about 25021.4206830867. The cubic root of 626071493 is about 855.4762883259.

The spelling of 626071493 in words is "six hundred twenty-six million, seventy-one thousand, four hundred ninety-three".