1699427 has 2 divisors, whose sum is σ = 1699428. Its totient is φ = 1699426.

The previous prime is 1699421. The next prime is 1699457. The reversal of 1699427 is 7249961.

It is a weak prime.

It is an emirp because it is prime and its reverse (7249961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1699427 - 2¹⁴ = 1683043 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1699421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849713 + 849714.

It is an arithmetic number, because the mean of its divisors is an integer number (849714).

2^1699427 is an apocalyptic number.

1699427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1699427 is an equidigital number, since it uses as much as digits as its factorization.

1699427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 1699427 is about 1303.6207270522. The cubic root of 1699427 is about 119.3349085512.

The spelling of 1699427 in words is "one million, six hundred ninety-nine thousand, four hundred twenty-seven".