687019253 has 2 divisors, whose sum is σ = 687019254. Its totient is φ = 687019252.

The previous prime is 687019199. The next prime is 687019301. The reversal of 687019253 is 352910786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464919844 + 222099409 = 21562^2 + 14903^2 .

It is a cyclic number.

It is not a de Polignac number, because 687019253 - 2⁶ = 687019189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 687019253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687019153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343509626 + 343509627.

It is an arithmetic number, because the mean of its divisors is an integer number (343509627).

Almost surely, 2^687019253 is an apocalyptic number.

It is an amenable number.

687019253 is a deficient number, since it is larger than the sum of its proper divisors (1).

687019253 is an equidigital number, since it uses as much as digits as its factorization.

687019253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 687019253 is about 26211.0521154722. The cubic root of 687019253 is about 882.3813141194.

The spelling of 687019253 in words is "six hundred eighty-seven million, nineteen thousand, two hundred fifty-three".