1645608967 has 2 divisors, whose sum is σ = 1645608968. Its totient is φ = 1645608966.

The previous prime is 1645608919. The next prime is 1645608989. The reversal of 1645608967 is 7698065461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1645608967 - 2²³ = 1637220359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1645608067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822804483 + 822804484.

It is an arithmetic number, because the mean of its divisors is an integer number (822804484).

Almost surely, 2^1645608967 is an apocalyptic number.

1645608967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645608967 is an equidigital number, since it uses as much as digits as its factorization.

1645608967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 1645608967 is about 40566.1061355413. The cubic root of 1645608967 is about 1180.6165902795.

The spelling of 1645608967 in words is "one billion, six hundred forty-five million, six hundred eight thousand, nine hundred sixty-seven".