143949853 has 4 divisors (see below), whose sum is σ = 147297568. Its totient is φ = 140602140.

The previous prime is 143949803. The next prime is 143949857. The reversal of 143949853 is 358949341.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 358949341 = 31 ⋅11579011.

It is a cyclic number.

It is not a de Polignac number, because 143949853 - 2¹⁷ = 143818781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143949857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673793 + ... + 1673878.

It is an arithmetic number, because the mean of its divisors is an integer number (36824392).

Almost surely, 2^143949853 is an apocalyptic number.

It is an amenable number.

143949853 is a deficient number, since it is larger than the sum of its proper divisors (3347715).

143949853 is an equidigital number, since it uses as much as digits as its factorization.

143949853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347714.

The product of its digits is 466560, while the sum is 46.

The square root of 143949853 is about 11997.9103597251. The cubic root of 143949853 is about 524.0874281116.

The spelling of 143949853 in words is "one hundred forty-three million, nine hundred forty-nine thousand, eight hundred fifty-three".