1680869731 has 2 divisors, whose sum is σ = 1680869732. Its totient is φ = 1680869730.

The previous prime is 1680869681. The next prime is 1680869737. The reversal of 1680869731 is 1379680861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1680869731 - 2²³ = 1672481123 is a prime.

It is a super-2 number, since 2×1680869731² = 5650646105184024722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1680869737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840434865 + 840434866.

It is an arithmetic number, because the mean of its divisors is an integer number (840434866).

Almost surely, 2^1680869731 is an apocalyptic number.

1680869731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680869731 is an equidigital number, since it uses as much as digits as its factorization.

1680869731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1680869731 is about 40998.4113228793. The cubic root of 1680869731 is about 1188.9894985424.

The spelling of 1680869731 in words is "one billion, six hundred eighty million, eight hundred sixty-nine thousand, seven hundred thirty-one".