1699214021 has 2 divisors, whose sum is σ = 1699214022. Its totient is φ = 1699214020.

The previous prime is 1699214003. The next prime is 1699214047. The reversal of 1699214021 is 1204129961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1575693025 + 123520996 = 39695^2 + 11114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1699214021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1699214071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849607010 + 849607011.

It is an arithmetic number, because the mean of its divisors is an integer number (849607011).

Almost surely, 2^1699214021 is an apocalyptic number.

It is an amenable number.

1699214021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1699214021 is an equidigital number, since it uses as much as digits as its factorization.

1699214021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1699214021 is about 41221.5237588326. The cubic root of 1699214021 is about 1193.2992316667.

It can be divided in two parts, 16992 and 14021, that added together give a palindrome (31013).

The spelling of 1699214021 in words is "one billion, six hundred ninety-nine million, two hundred fourteen thousand, twenty-one".