145234889 has 2 divisors, whose sum is σ = 145234890. Its totient is φ = 145234888.

The previous prime is 145234883. The next prime is 145234897. The reversal of 145234889 is 988432541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73273600 + 71961289 = 8560^2 + 8483^2 .

It is a cyclic number.

It is not a de Polignac number, because 145234889 - 2¹² = 145230793 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (145234883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72617444 + 72617445.

It is an arithmetic number, because the mean of its divisors is an integer number (72617445).

Almost surely, 2^145234889 is an apocalyptic number.

It is an amenable number.

145234889 is a deficient number, since it is larger than the sum of its proper divisors (1).

145234889 is an equidigital number, since it uses as much as digits as its factorization.

145234889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The square root of 145234889 is about 12051.3438669718. The cubic root of 145234889 is about 525.6423146669.

The spelling of 145234889 in words is "one hundred forty-five million, two hundred thirty-four thousand, eight hundred eighty-nine".