1645360903 has 2 divisors, whose sum is σ = 1645360904. Its totient is φ = 1645360902.

The previous prime is 1645360897. The next prime is 1645360939. The reversal of 1645360903 is 3090635461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645360903 is a prime.

It is a super-2 number, since 2×1645360903² = 5414425002241950818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1645366903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 822680451 + 822680452.

It is an arithmetic number, because the mean of its divisors is an integer number (822680452).

Almost surely, 2^1645360903 is an apocalyptic number.

1645360903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1645360903 is an equidigital number, since it uses as much as digits as its factorization.

1645360903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 1645360903 is about 40563.0484924395. The cubic root of 1645360903 is about 1180.5572640773.

The spelling of 1645360903 in words is "one billion, six hundred forty-five million, three hundred sixty thousand, nine hundred three".