145018691 has 2 divisors, whose sum is σ = 145018692. Its totient is φ = 145018690.

The previous prime is 145018673. The next prime is 145018733. The reversal of 145018691 is 196810541.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145018691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145018631) 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, 72509345 + 72509346.

It is an arithmetic number, because the mean of its divisors is an integer number (72509346).

Almost surely, 2^145018691 is an apocalyptic number.

145018691 is a deficient number, since it is larger than the sum of its proper divisors (1).

145018691 is an equidigital number, since it uses as much as digits as its factorization.

145018691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 145018691 is about 12042.3706553153. The cubic root of 145018691 is about 525.3813597992.

The spelling of 145018691 in words is "one hundred forty-five million, eighteen thousand, six hundred ninety-one".