3891940143 has 16 divisors (see below), whose sum is σ = 6386774016. Its totient is φ = 2052891360.

The previous prime is 3891940123. The next prime is 3891940163. The reversal of 3891940143 is 3410491983.

It is an interprime number because it is at equal distance from previous prime (3891940123) and next prime (3891940163).

It is not a de Polignac number, because 3891940143 - 2¹³ = 3891931951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3891940095 and 3891940104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891940123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7127823 + ... + 7128368.

It is an arithmetic number, because the mean of its divisors is an integer number (399173376).

Almost surely, 2^3891940143 is an apocalyptic number.

3891940143 is a deficient number, since it is larger than the sum of its proper divisors (2494833873).

3891940143 is a wasteful number, since it uses less digits than its factorization.

3891940143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256214.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 3891940143 is about 62385.4161082540. The cubic root of 3891940143 is about 1572.9758349630.

The spelling of 3891940143 in words is "three billion, eight hundred ninety-one million, nine hundred forty thousand, one hundred forty-three".