1940143667 has 16 divisors (see below), whose sum is σ = 2437357824. Its totient is φ = 1500252000.

The previous prime is 1940143651. The next prime is 1940143697. The reversal of 1940143667 is 7663410491.

It is a cyclic number.

It is not a de Polignac number, because 1940143667 - 2⁴ = 1940143651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1940143607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86084 + ... + 106257.

It is an arithmetic number, because the mean of its divisors is an integer number (152334864).

Almost surely, 2^1940143667 is an apocalyptic number.

1940143667 is a deficient number, since it is larger than the sum of its proper divisors (497214157).

1940143667 is a wasteful number, since it uses less digits than its factorization.

1940143667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192490.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1940143667 is about 44047.0619565028. The cubic root of 1940143667 is about 1247.2244907600.

The spelling of 1940143667 in words is "one billion, nine hundred forty million, one hundred forty-three thousand, six hundred sixty-seven".