1689677147 has 2 divisors, whose sum is σ = 1689677148. Its totient is φ = 1689677146.

The previous prime is 1689677063. The next prime is 1689677159. The reversal of 1689677147 is 7417769861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689677147 is a prime.

It is a super-2 number, since 2×1689677147² = 5710017722188119218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1689677092 and 1689677101.

It is not a weakly prime, because it can be changed into another prime (1689673147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844838573 + 844838574.

It is an arithmetic number, because the mean of its divisors is an integer number (844838574).

Almost surely, 2^1689677147 is an apocalyptic number.

1689677147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689677147 is an equidigital number, since it uses as much as digits as its factorization.

1689677147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 56.

The square root of 1689677147 is about 41105.6826606736. The cubic root of 1689677147 is about 1191.0625697516.

The spelling of 1689677147 in words is "one billion, six hundred eighty-nine million, six hundred seventy-seven thousand, one hundred forty-seven".