697610865449 has 2 divisors, whose sum is σ = 697610865450. Its totient is φ = 697610865448.

The previous prime is 697610865401. The next prime is 697610865461. The reversal of 697610865449 is 944568016796.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 615338269225 + 82272596224 = 784435^2 + 286832^2 .

It is a cyclic number.

It is not a de Polignac number, because 697610865449 - 2¹⁶ = 697610799913 is a prime.

It is not a weakly prime, because it can be changed into another prime (697610865499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348805432724 + 348805432725.

It is an arithmetic number, because the mean of its divisors is an integer number (348805432725).

Almost surely, 2^697610865449 is an apocalyptic number.

It is an amenable number.

697610865449 is a deficient number, since it is larger than the sum of its proper divisors (1).

697610865449 is an equidigital number, since it uses as much as digits as its factorization.

697610865449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 697610865449 in words is "six hundred ninety-seven billion, six hundred ten million, eight hundred sixty-five thousand, four hundred forty-nine".