1690178141 has 2 divisors, whose sum is σ = 1690178142. Its totient is φ = 1690178140.

The previous prime is 1690178129. The next prime is 1690178143. The reversal of 1690178141 is 1418710961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1492663225 + 197514916 = 38635^2 + 14054^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690178141 - 2¹⁰ = 1690177117 is a prime.

Together with 1690178143, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1690178095 and 1690178104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690178143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845089070 + 845089071.

It is an arithmetic number, because the mean of its divisors is an integer number (845089071).

Almost surely, 2^1690178141 is an apocalyptic number.

It is an amenable number.

1690178141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690178141 is an equidigital number, since it uses as much as digits as its factorization.

1690178141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 1690178141 is about 41111.7761839597. The cubic root of 1690178141 is about 1191.1802759134.

The spelling of 1690178141 in words is "one billion, six hundred ninety million, one hundred seventy-eight thousand, one hundred forty-one".