699430421 has 2 divisors, whose sum is σ = 699430422. Its totient is φ = 699430420.

The previous prime is 699430379. The next prime is 699430493. The reversal of 699430421 is 124034996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 367680625 + 331749796 = 19175^2 + 18214^2 .

It is a cyclic number.

It is not a de Polignac number, because 699430421 - 2¹⁰ = 699429397 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699435421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349715210 + 349715211.

It is an arithmetic number, because the mean of its divisors is an integer number (349715211).

Almost surely, 2^699430421 is an apocalyptic number.

It is an amenable number.

699430421 is a deficient number, since it is larger than the sum of its proper divisors (1).

699430421 is an equidigital number, since it uses as much as digits as its factorization.

699430421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 699430421 is about 26446.7468887952. The cubic root of 699430421 is about 887.6631118835.

The spelling of 699430421 in words is "six hundred ninety-nine million, four hundred thirty thousand, four hundred twenty-one".