1945614509 has 2 divisors, whose sum is σ = 1945614510. Its totient is φ = 1945614508.

The previous prime is 1945614499. The next prime is 1945614511. The reversal of 1945614509 is 9054165491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1797505609 + 148108900 = 42397^2 + 12170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945614509 is a prime.

It is a super-2 number, since 2×1945614509² = 7570831635262622162, which contains 22 as substring.

Together with 1945614511, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1945614509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1945604509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972807254 + 972807255.

It is an arithmetic number, because the mean of its divisors is an integer number (972807255).

Almost surely, 2^1945614509 is an apocalyptic number.

It is an amenable number.

1945614509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945614509 is an equidigital number, since it uses as much as digits as its factorization.

1945614509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1945614509 is about 44109.1204741151. The cubic root of 1945614509 is about 1248.3957037878.

The spelling of 1945614509 in words is "one billion, nine hundred forty-five million, six hundred fourteen thousand, five hundred nine".