143139947 has 2 divisors, whose sum is σ = 143139948. Its totient is φ = 143139946.

The previous prime is 143139877. The next prime is 143139967. The reversal of 143139947 is 749931341.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143139947 - 2¹⁸ = 142877803 is a prime.

It is not a weakly prime, because it can be changed into another prime (143139967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71569973 + 71569974.

It is an arithmetic number, because the mean of its divisors is an integer number (71569974).

Almost surely, 2^143139947 is an apocalyptic number.

143139947 is a deficient number, since it is larger than the sum of its proper divisors (1).

143139947 is an equidigital number, since it uses as much as digits as its factorization.

143139947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 143139947 is about 11964.1107901925. The cubic root of 143139947 is about 523.1026868016.

The spelling of 143139947 in words is "one hundred forty-three million, one hundred thirty-nine thousand, nine hundred forty-seven".