145219979 has 2 divisors, whose sum is σ = 145219980. Its totient is φ = 145219978.

The previous prime is 145219927. The next prime is 145220039. The reversal of 145219979 is 979912541.

145219979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145219979 - 2¹² = 145215883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145219279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72609989 + 72609990.

It is an arithmetic number, because the mean of its divisors is an integer number (72609990).

Almost surely, 2^145219979 is an apocalyptic number.

145219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

145219979 is an equidigital number, since it uses as much as digits as its factorization.

145219979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 47.

The square root of 145219979 is about 12050.7252478845. The cubic root of 145219979 is about 525.6243263466.

The spelling of 145219979 in words is "one hundred forty-five million, two hundred nineteen thousand, nine hundred seventy-nine".