697061749 has 2 divisors, whose sum is σ = 697061750. Its totient is φ = 697061748.

The previous prime is 697061737. The next prime is 697061773. The reversal of 697061749 is 947160796.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432348849 + 264712900 = 20793^2 + 16270^2 .

It is a cyclic number.

It is not a de Polignac number, because 697061749 - 2¹³ = 697053557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (697062749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348530874 + 348530875.

It is an arithmetic number, because the mean of its divisors is an integer number (348530875).

Almost surely, 2^697061749 is an apocalyptic number.

It is an amenable number.

697061749 is a deficient number, since it is larger than the sum of its proper divisors (1).

697061749 is an equidigital number, since it uses as much as digits as its factorization.

697061749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 697061749 is about 26401.9269940662. The cubic root of 697061749 is about 886.6599333507.

The spelling of 697061749 in words is "six hundred ninety-seven million, sixty-one thousand, seven hundred forty-nine".