690231193 has 2 divisors, whose sum is σ = 690231194. Its totient is φ = 690231192.

The previous prime is 690231169. The next prime is 690231211. The reversal of 690231193 is 391132096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 483648064 + 206583129 = 21992^2 + 14373^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690231193 is a prime.

It is not a weakly prime, because it can be changed into another prime (690231103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345115596 + 345115597.

It is an arithmetic number, because the mean of its divisors is an integer number (345115597).

Almost surely, 2^690231193 is an apocalyptic number.

It is an amenable number.

690231193 is a deficient number, since it is larger than the sum of its proper divisors (1).

690231193 is an equidigital number, since it uses as much as digits as its factorization.

690231193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 690231193 is about 26272.2513881091. The cubic root of 690231193 is about 883.7542744502.

The spelling of 690231193 in words is "six hundred ninety million, two hundred thirty-one thousand, one hundred ninety-three".