3870535891 has 2 divisors, whose sum is σ = 3870535892. Its totient is φ = 3870535890.

The previous prime is 3870535861. The next prime is 3870535901. The reversal of 3870535891 is 1985350783.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3870535891 is a prime.

It is not a weakly prime, because it can be changed into another prime (3870535811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1935267945 + 1935267946.

It is an arithmetic number, because the mean of its divisors is an integer number (1935267946).

Almost surely, 2^3870535891 is an apocalyptic number.

3870535891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3870535891 is an equidigital number, since it uses as much as digits as its factorization.

3870535891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 49.

The square root of 3870535891 is about 62213.6310706906. The cubic root of 3870535891 is about 1570.0869346157.

The spelling of 3870535891 in words is "three billion, eight hundred seventy million, five hundred thirty-five thousand, eight hundred ninety-one".