690348349 has 2 divisors, whose sum is σ = 690348350. Its totient is φ = 690348348.

The previous prime is 690348319. The next prime is 690348377. The reversal of 690348349 is 943843096.

690348349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 581292100 + 109056249 = 24110^2 + 10443^2 .

It is a cyclic number.

It is not a de Polignac number, because 690348349 - 2⁷ = 690348221 is a prime.

It is equal to p_35778925 and since 690348349 and 35778925 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 690348299 and 690348308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690348319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345174174 + 345174175.

It is an arithmetic number, because the mean of its divisors is an integer number (345174175).

Almost surely, 2^690348349 is an apocalyptic number.

It is an amenable number.

690348349 is a deficient number, since it is larger than the sum of its proper divisors (1).

690348349 is an equidigital number, since it uses as much as digits as its factorization.

690348349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 690348349 is about 26274.4809463479. The cubic root of 690348349 is about 883.8042727983.

The spelling of 690348349 in words is "six hundred ninety million, three hundred forty-eight thousand, three hundred forty-nine".