690347429 has 2 divisors, whose sum is σ = 690347430. Its totient is φ = 690347428.

The previous prime is 690347321. The next prime is 690347459. The reversal of 690347429 is 924743096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 491819329 + 198528100 = 22177^2 + 14090^2 .

It is a cyclic number.

It is not a de Polignac number, because 690347429 - 2⁸ = 690347173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 690347429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690347459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345173714 + 345173715.

It is an arithmetic number, because the mean of its divisors is an integer number (345173715).

Almost surely, 2^690347429 is an apocalyptic number.

It is an amenable number.

690347429 is a deficient number, since it is larger than the sum of its proper divisors (1).

690347429 is an equidigital number, since it uses as much as digits as its factorization.

690347429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 690347429 is about 26274.4634388602. The cubic root of 690347429 is about 883.8038801945.

The spelling of 690347429 in words is "six hundred ninety million, three hundred forty-seven thousand, four hundred twenty-nine".