3891354391 has 8 divisors (see below), whose sum is σ = 4053737600. Its totient is φ = 3731274720.

The previous prime is 3891354377. The next prime is 3891354407. The reversal of 3891354391 is 1934531983.

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 3891354391 - 2¹⁷ = 3891223319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891354301) 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, 572436 + ... + 579193.

It is an arithmetic number, because the mean of its divisors is an integer number (506717200).

Almost surely, 2^3891354391 is an apocalyptic number.

3891354391 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3891354391 is a deficient number, since it is larger than the sum of its proper divisors (162383209).

3891354391 is a wasteful number, since it uses less digits than its factorization.

3891354391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151769.

The product of its digits is 349920, while the sum is 46.

The square root of 3891354391 is about 62380.7213087505. The cubic root of 3891354391 is about 1572.8969180274.

The spelling of 3891354391 in words is "three billion, eight hundred ninety-one million, three hundred fifty-four thousand, three hundred ninety-one".