696578749 has 2 divisors, whose sum is σ = 696578750. Its totient is φ = 696578748.

The previous prime is 696578677. The next prime is 696578789. The reversal of 696578749 is 947875696.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408767524 + 287811225 = 20218^2 + 16965^2 .

It is a cyclic number.

It is not a de Polignac number, because 696578749 - 2⁹ = 696578237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696578789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348289374 + 348289375.

It is an arithmetic number, because the mean of its divisors is an integer number (348289375).

Almost surely, 2^696578749 is an apocalyptic number.

It is an amenable number.

696578749 is a deficient number, since it is larger than the sum of its proper divisors (1).

696578749 is an equidigital number, since it uses as much as digits as its factorization.

696578749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22861440, while the sum is 61.

The square root of 696578749 is about 26392.7783493894. The cubic root of 696578749 is about 886.4550946350.

The spelling of 696578749 in words is "six hundred ninety-six million, five hundred seventy-eight thousand, seven hundred forty-nine".