687920567 has 2 divisors, whose sum is σ = 687920568. Its totient is φ = 687920566.

The previous prime is 687920507. The next prime is 687920599. The reversal of 687920567 is 765029786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687920567 - 2⁶ = 687920503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687920507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343960283 + 343960284.

It is an arithmetic number, because the mean of its divisors is an integer number (343960284).

Almost surely, 2^687920567 is an apocalyptic number.

687920567 is a deficient number, since it is larger than the sum of its proper divisors (1).

687920567 is an equidigital number, since it uses as much as digits as its factorization.

687920567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The square root of 687920567 is about 26228.2398761335. The cubic root of 687920567 is about 882.7670166017.

The spelling of 687920567 in words is "six hundred eighty-seven million, nine hundred twenty thousand, five hundred sixty-seven".