690117549497 has 2 divisors, whose sum is σ = 690117549498. Its totient is φ = 690117549496.

The previous prime is 690117549461. The next prime is 690117549553. The reversal of 690117549497 is 794945711096.

690117549497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675789220096 + 14328329401 = 822064^2 + 119701^2 .

It is a cyclic number.

It is not a de Polignac number, because 690117549497 - 2¹² = 690117545401 is a prime.

It is not a weakly prime, because it can be changed into another prime (690117549397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345058774748 + 345058774749.

It is an arithmetic number, because the mean of its divisors is an integer number (345058774749).

Almost surely, 2^690117549497 is an apocalyptic number.

It is an amenable number.

690117549497 is a deficient number, since it is larger than the sum of its proper divisors (1).

690117549497 is an equidigital number, since it uses as much as digits as its factorization.

690117549497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 62.

The spelling of 690117549497 in words is "six hundred ninety billion, one hundred seventeen million, five hundred forty-nine thousand, four hundred ninety-seven".