1689902041 has 2 divisors, whose sum is σ = 1689902042. Its totient is φ = 1689902040.

The previous prime is 1689901937. The next prime is 1689902059. The reversal of 1689902041 is 1402099861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1474252816 + 215649225 = 38396^2 + 14685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1689902041 - 2¹⁵ = 1689869273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1689901985 and 1689902003.

It is not a weakly prime, because it can be changed into another prime (1689902141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844951020 + 844951021.

It is an arithmetic number, because the mean of its divisors is an integer number (844951021).

Almost surely, 2^1689902041 is an apocalyptic number.

It is an amenable number.

1689902041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689902041 is an equidigital number, since it uses as much as digits as its factorization.

1689902041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1689902041 is about 41108.4181281645. The cubic root of 1689902041 is about 1191.1154104068.

The spelling of 1689902041 in words is "one billion, six hundred eighty-nine million, nine hundred two thousand, forty-one".