144187933 has 2 divisors, whose sum is σ = 144187934. Its totient is φ = 144187932.

The previous prime is 144187919. The next prime is 144187969. The reversal of 144187933 is 339781441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124500964 + 19686969 = 11158^2 + 4437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144187933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144187033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72093966 + 72093967.

It is an arithmetic number, because the mean of its divisors is an integer number (72093967).

Almost surely, 2^144187933 is an apocalyptic number.

It is an amenable number.

144187933 is a deficient number, since it is larger than the sum of its proper divisors (1).

144187933 is an equidigital number, since it uses as much as digits as its factorization.

144187933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 40.

The square root of 144187933 is about 12007.8279884415. The cubic root of 144187933 is about 524.3761999922.

The spelling of 144187933 in words is "one hundred forty-four million, one hundred eighty-seven thousand, nine hundred thirty-three".