697155149 has 2 divisors, whose sum is σ = 697155150. Its totient is φ = 697155148.

The previous prime is 697155143. The next prime is 697155247. The reversal of 697155149 is 941551796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422590249 + 274564900 = 20557^2 + 16570^2 .

It is a cyclic number.

It is not a de Polignac number, because 697155149 - 2⁴ = 697155133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697155143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348577574 + 348577575.

It is an arithmetic number, because the mean of its divisors is an integer number (348577575).

Almost surely, 2^697155149 is an apocalyptic number.

It is an amenable number.

697155149 is a deficient number, since it is larger than the sum of its proper divisors (1).

697155149 is an equidigital number, since it uses as much as digits as its factorization.

697155149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The square root of 697155149 is about 26403.6957451036. The cubic root of 697155149 is about 886.6995330654.

The spelling of 697155149 in words is "six hundred ninety-seven million, one hundred fifty-five thousand, one hundred forty-nine".