143995913 has 2 divisors, whose sum is σ = 143995914. Its totient is φ = 143995912.

The previous prime is 143995883. The next prime is 143995937. The reversal of 143995913 is 319599341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133934329 + 10061584 = 11573^2 + 3172^2 .

It is a cyclic number.

It is not a de Polignac number, because 143995913 - 2⁶ = 143995849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (143995513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71997956 + 71997957.

It is an arithmetic number, because the mean of its divisors is an integer number (71997957).

Almost surely, 2^143995913 is an apocalyptic number.

It is an amenable number.

143995913 is a deficient number, since it is larger than the sum of its proper divisors (1).

143995913 is an equidigital number, since it uses as much as digits as its factorization.

143995913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 44.

The square root of 143995913 is about 11999.8297071250. The cubic root of 143995913 is about 524.1433200124.

The spelling of 143995913 in words is "one hundred forty-three million, nine hundred ninety-five thousand, nine hundred thirteen".