145849889 has 2 divisors, whose sum is σ = 145849890. Its totient is φ = 145849888.

The previous prime is 145849861. The next prime is 145849897. The reversal of 145849889 is 988948541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124992400 + 20857489 = 11180^2 + 4567^2 .

It is a cyclic number.

It is not a de Polignac number, because 145849889 - 2⁸ = 145849633 is a prime.

It is not a weakly prime, because it can be changed into another prime (145849849) 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, 72924944 + 72924945.

It is an arithmetic number, because the mean of its divisors is an integer number (72924945).

Almost surely, 2^145849889 is an apocalyptic number.

It is an amenable number.

145849889 is a deficient number, since it is larger than the sum of its proper divisors (1).

145849889 is an equidigital number, since it uses as much as digits as its factorization.

145849889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3317760, while the sum is 56.

The square root of 145849889 is about 12076.8327387606. The cubic root of 145849889 is about 526.3832174403.

The spelling of 145849889 in words is "one hundred forty-five million, eight hundred forty-nine thousand, eight hundred eighty-nine".