3872346391 has 2 divisors, whose sum is σ = 3872346392. Its totient is φ = 3872346390.

The previous prime is 3872346347. The next prime is 3872346421. The reversal of 3872346391 is 1936432783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3872346391 - 2²¹ = 3870249239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3872344391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1936173195 + 1936173196.

It is an arithmetic number, because the mean of its divisors is an integer number (1936173196).

Almost surely, 2^3872346391 is an apocalyptic number.

3872346391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3872346391 is an equidigital number, since it uses as much as digits as its factorization.

3872346391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 46.

The square root of 3872346391 is about 62228.1800392716. The cubic root of 3872346391 is about 1570.3317068610.

The spelling of 3872346391 in words is "three billion, eight hundred seventy-two million, three hundred forty-six thousand, three hundred ninety-one".