3891340999 has 64 divisors (see below), whose sum is σ = 5275648000. Its totient is φ = 2783963520.

The previous prime is 3891340979. The next prime is 3891341009. The reversal of 3891340999 is 9990431983.

It is not a de Polignac number, because 3891340999 - 2¹⁵ = 3891308231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891340939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4233862 + ... + 4234780.

It is an arithmetic number, because the mean of its divisors is an integer number (82432000).

Almost surely, 2^3891340999 is an apocalyptic number.

3891340999 is a deficient number, since it is larger than the sum of its proper divisors (1384307001).

3891340999 is a wasteful number, since it uses less digits than its factorization.

3891340999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The square root of 3891340999 is about 62380.6139678025. The cubic root of 3891340999 is about 1572.8951136634.

The spelling of 3891340999 in words is "three billion, eight hundred ninety-one million, three hundred forty thousand, nine hundred ninety-nine".