3900913042391 has 2 divisors, whose sum is σ = 3900913042392. Its totient is φ = 3900913042390.

The previous prime is 3900913042387. The next prime is 3900913042417. The reversal of 3900913042391 is 1932403190093.

3900913042391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3900913042391 - 2² = 3900913042387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3900913042361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950456521195 + 1950456521196.

It is an arithmetic number, because the mean of its divisors is an integer number (1950456521196).

Almost surely, 2^{3900913042391} is an apocalyptic number.

3900913042391 is a deficient number, since it is larger than the sum of its proper divisors (1).

3900913042391 is an equidigital number, since it uses as much as digits as its factorization.

3900913042391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 3900913042391 in words is "three trillion, nine hundred billion, nine hundred thirteen million, forty-two thousand, three hundred ninety-one".