145119991 has 2 divisors, whose sum is σ = 145119992. Its totient is φ = 145119990.

The previous prime is 145119983. The next prime is 145120013. The reversal of 145119991 is 199911541.

It is a weak prime.

It is an emirp because it is prime and its reverse (199911541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145119991 - 2³ = 145119983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145119971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72559995 + 72559996.

It is an arithmetic number, because the mean of its divisors is an integer number (72559996).

Almost surely, 2^145119991 is an apocalyptic number.

145119991 is a deficient number, since it is larger than the sum of its proper divisors (1).

145119991 is an equidigital number, since it uses as much as digits as its factorization.

145119991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 40.

The square root of 145119991 is about 12046.5759035504. The cubic root of 145119991 is about 525.5036629864.

The spelling of 145119991 in words is "one hundred forty-five million, one hundred nineteen thousand, nine hundred ninety-one".