690340177 has 2 divisors, whose sum is σ = 690340178. Its totient is φ = 690340176.

The previous prime is 690340169. The next prime is 690340207. The reversal of 690340177 is 771043096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 500148496 + 190191681 = 22364^2 + 13791^2 .

It is a cyclic number.

It is not a de Polignac number, because 690340177 - 2³ = 690340169 is a prime.

It is not a weakly prime, because it can be changed into another prime (690040177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345170088 + 345170089.

It is an arithmetic number, because the mean of its divisors is an integer number (345170089).

Almost surely, 2^690340177 is an apocalyptic number.

It is an amenable number.

690340177 is a deficient number, since it is larger than the sum of its proper divisors (1).

690340177 is an equidigital number, since it uses as much as digits as its factorization.

690340177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 690340177 is about 26274.3254337766. The cubic root of 690340177 is about 883.8007854396.

The spelling of 690340177 in words is "six hundred ninety million, three hundred forty thousand, one hundred seventy-seven".