696640429 has 2 divisors, whose sum is σ = 696640430. Its totient is φ = 696640428.

The previous prime is 696640423. The next prime is 696640487. The reversal of 696640429 is 924046696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659308329 + 37332100 = 25677^2 + 6110^2 .

It is a cyclic number.

It is not a de Polignac number, because 696640429 - 2³ = 696640421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (696640421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348320214 + 348320215.

It is an arithmetic number, because the mean of its divisors is an integer number (348320215).

Almost surely, 2^696640429 is an apocalyptic number.

It is an amenable number.

696640429 is a deficient number, since it is larger than the sum of its proper divisors (1).

696640429 is an equidigital number, since it uses as much as digits as its factorization.

696640429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 696640429 is about 26393.9468249824. The cubic root of 696640429 is about 886.4812581935.

The spelling of 696640429 in words is "six hundred ninety-six million, six hundred forty thousand, four hundred twenty-nine".