1699959427 has 2 divisors, whose sum is σ = 1699959428. Its totient is φ = 1699959426.

The previous prime is 1699959409. The next prime is 1699959433. The reversal of 1699959427 is 7249599961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1699959427 - 2¹⁹ = 1699435139 is a prime.

It is not a weakly prime, because it can be changed into another prime (1699959227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849979713 + 849979714.

It is an arithmetic number, because the mean of its divisors is an integer number (849979714).

Almost surely, 2^1699959427 is an apocalyptic number.

1699959427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1699959427 is an equidigital number, since it uses as much as digits as its factorization.

1699959427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11022480, while the sum is 61.

The square root of 1699959427 is about 41230.5642333451. The cubic root of 1699959427 is about 1193.4736971080.

The spelling of 1699959427 in words is "one billion, six hundred ninety-nine million, nine hundred fifty-nine thousand, four hundred twenty-seven".