45000019 has 2 divisors, whose sum is σ = 45000020. Its totient is φ = 45000018.

The previous prime is 45000017. The next prime is 45000023. The reversal of 45000019 is 91000054.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45000019 - 2¹ = 45000017 is a prime.

It is a super-2 number, since 2×45000019² = 4050003420000722, which contains 22 as substring.

Together with 45000017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (45000017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22500009 + 22500010.

It is an arithmetic number, because the mean of its divisors is an integer number (22500010).

Almost surely, 2^45000019 is an apocalyptic number.

45000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

45000019 is an equidigital number, since it uses as much as digits as its factorization.

45000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 45000019 is about 6708.2053486756. The cubic root of 45000019 is about 355.6893805090.

The spelling of 45000019 in words is "forty-five million, nineteen", and thus it is an aban number and an uban number.