697946149 has 2 divisors, whose sum is σ = 697946150. Its totient is φ = 697946148.

The previous prime is 697946129. The next prime is 697946167. The reversal of 697946149 is 941649796.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 524181025 + 173765124 = 22895^2 + 13182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697946149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 697946149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697946129) 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, 348973074 + 348973075.

It is an arithmetic number, because the mean of its divisors is an integer number (348973075).

Almost surely, 2^697946149 is an apocalyptic number.

It is an amenable number.

697946149 is a deficient number, since it is larger than the sum of its proper divisors (1).

697946149 is an equidigital number, since it uses as much as digits as its factorization.

697946149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2939328, while the sum is 55.

The square root of 697946149 is about 26418.6704623832. The cubic root of 697946149 is about 887.0347593702.

The spelling of 697946149 in words is "six hundred ninety-seven million, nine hundred forty-six thousand, one hundred forty-nine".