153143993 has 2 divisors, whose sum is σ = 153143994. Its totient is φ = 153143992.

The previous prime is 153143981. The next prime is 153144023. The reversal of 153143993 is 399341351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149035264 + 4108729 = 12208^2 + 2027^2 .

It is a cyclic number.

It is not a de Polignac number, because 153143993 - 2⁶ = 153143929 is a prime.

It is not a weakly prime, because it can be changed into another prime (153146993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76571996 + 76571997.

It is an arithmetic number, because the mean of its divisors is an integer number (76571997).

Almost surely, 2^153143993 is an apocalyptic number.

It is an amenable number.

153143993 is a deficient number, since it is larger than the sum of its proper divisors (1).

153143993 is an equidigital number, since it uses as much as digits as its factorization.

153143993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 38.

The square root of 153143993 is about 12375.1360800599. The cubic root of 153143993 is about 535.0158588480.

The spelling of 153143993 in words is "one hundred fifty-three million, one hundred forty-three thousand, nine hundred ninety-three".