143995961 has 8 divisors (see below), whose sum is σ = 148800000. Its totient is φ = 139201920.

The previous prime is 143995937. The next prime is 143995979. The reversal of 143995961 is 169599341.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 143995961 - 2²² = 139801657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143905961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36860 + ... + 40578.

It is an arithmetic number, because the mean of its divisors is an integer number (18600000).

Almost surely, 2^143995961 is an apocalyptic number.

It is an amenable number.

143995961 is a deficient number, since it is larger than the sum of its proper divisors (4804039).

143995961 is a wasteful number, since it uses less digits than its factorization.

143995961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999.

The product of its digits is 262440, while the sum is 47.

The square root of 143995961 is about 11999.8317071532. The cubic root of 143995961 is about 524.1433782522.

The spelling of 143995961 in words is "one hundred forty-three million, nine hundred ninety-five thousand, nine hundred sixty-one".