143194690 has 8 divisors (see below), whose sum is σ = 257750460. Its totient is φ = 57277872.

The previous prime is 143194679. The next prime is 143194691. The reversal of 143194690 is 96491341.

It can be written as a sum of positive squares in 2 ways, for example, as 126360081 + 16834609 = 11241^2 + 4103^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×143194690² = 41009438488392200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (143194691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7159725 + ... + 7159744.

Almost surely, 2^143194690 is an apocalyptic number.

143194690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

143194690 is a deficient number, since it is larger than the sum of its proper divisors (114555770).

143194690 is a wasteful number, since it uses less digits than its factorization.

143194690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14319476.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 143194690 is about 11966.3983721085. The cubic root of 143194690 is about 523.1693641133.

The spelling of 143194690 in words is "one hundred forty-three million, one hundred ninety-four thousand, six hundred ninety".