690498563 has 2 divisors, whose sum is σ = 690498564. Its totient is φ = 690498562.

The previous prime is 690498553. The next prime is 690498569. The reversal of 690498563 is 365894096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690498563 - 2⁴ = 690498547 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (690498569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345249281 + 345249282.

It is an arithmetic number, because the mean of its divisors is an integer number (345249282).

Almost surely, 2^690498563 is an apocalyptic number.

690498563 is a deficient number, since it is larger than the sum of its proper divisors (1).

690498563 is an equidigital number, since it uses as much as digits as its factorization.

690498563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The square root of 690498563 is about 26277.3393440051. The cubic root of 690498563 is about 883.8683709440.

The spelling of 690498563 in words is "six hundred ninety million, four hundred ninety-eight thousand, five hundred sixty-three".