697009477 has 2 divisors, whose sum is σ = 697009478. Its totient is φ = 697009476.

The previous prime is 697009447. The next prime is 697009493. The reversal of 697009477 is 774900796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364275396 + 332734081 = 19086^2 + 18241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-697009477 is a prime.

It is a super-2 number, since 2×697009477² = 971644422055627058, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 697009477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697009427) 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, 348504738 + 348504739.

It is an arithmetic number, because the mean of its divisors is an integer number (348504739).

Almost surely, 2^697009477 is an apocalyptic number.

It is an amenable number.

697009477 is a deficient number, since it is larger than the sum of its proper divisors (1).

697009477 is an equidigital number, since it uses as much as digits as its factorization.

697009477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 697009477 is about 26400.9370477640. The cubic root of 697009477 is about 886.6377695339.

The spelling of 697009477 in words is "six hundred ninety-seven million, nine thousand, four hundred seventy-seven".