143979491 has 2 divisors, whose sum is σ = 143979492. Its totient is φ = 143979490.

The previous prime is 143979457. The next prime is 143979509. The reversal of 143979491 is 194979341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143979491 - 2¹⁸ = 143717347 is a prime.

It is not a weakly prime, because it can be changed into another prime (143979401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71989745 + 71989746.

It is an arithmetic number, because the mean of its divisors is an integer number (71989746).

Almost surely, 2^143979491 is an apocalyptic number.

143979491 is a deficient number, since it is larger than the sum of its proper divisors (1).

143979491 is an equidigital number, since it uses as much as digits as its factorization.

143979491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 143979491 is about 11999.1454279044. The cubic root of 143979491 is about 524.1233939635.

The spelling of 143979491 in words is "one hundred forty-three million, nine hundred seventy-nine thousand, four hundred ninety-one".