687250793 has 2 divisors, whose sum is σ = 687250794. Its totient is φ = 687250792.

The previous prime is 687250769. The next prime is 687250807. The reversal of 687250793 is 397052786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553802089 + 133448704 = 23533^2 + 11552^2 .

It is a cyclic number.

It is not a de Polignac number, because 687250793 - 2⁸ = 687250537 is a prime.

It is not a weakly prime, because it can be changed into another prime (687550793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343625396 + 343625397.

It is an arithmetic number, because the mean of its divisors is an integer number (343625397).

Almost surely, 2^687250793 is an apocalyptic number.

It is an amenable number.

687250793 is a deficient number, since it is larger than the sum of its proper divisors (1).

687250793 is an equidigital number, since it uses as much as digits as its factorization.

687250793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 687250793 is about 26215.4685824992. The cubic root of 687250793 is about 882.4804300325.

The spelling of 687250793 in words is "six hundred eighty-seven million, two hundred fifty thousand, seven hundred ninety-three".