1606981247 has 2 divisors, whose sum is σ = 1606981248. Its totient is φ = 1606981246.

The previous prime is 1606981237. The next prime is 1606981267. The reversal of 1606981247 is 7421896061.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1606981247 - 2³⁰ = 533239423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1606981198 and 1606981207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606981217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803490623 + 803490624.

It is an arithmetic number, because the mean of its divisors is an integer number (803490624).

Almost surely, 2^1606981247 is an apocalyptic number.

1606981247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606981247 is an equidigital number, since it uses as much as digits as its factorization.

1606981247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 1606981247 is about 40087.1706035734. The cubic root of 1606981247 is about 1171.3057346346.

The spelling of 1606981247 in words is "one billion, six hundred six million, nine hundred eighty-one thousand, two hundred forty-seven".