145117939 has 2 divisors, whose sum is σ = 145117940. Its totient is φ = 145117938.

The previous prime is 145117873. The next prime is 145117949. The reversal of 145117939 is 939711541.

145117939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145117939 - 2¹³ = 145109747 is a prime.

It is not a weakly prime, because it can be changed into another prime (145117949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72558969 + 72558970.

It is an arithmetic number, because the mean of its divisors is an integer number (72558970).

Almost surely, 2^145117939 is an apocalyptic number.

145117939 is a deficient number, since it is larger than the sum of its proper divisors (1).

145117939 is an equidigital number, since it uses as much as digits as its factorization.

145117939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 145117939 is about 12046.4907338195. The cubic root of 145117939 is about 525.5011860968.

The spelling of 145117939 in words is "one hundred forty-five million, one hundred seventeen thousand, nine hundred thirty-nine".