3914221791 has 16 divisors (see below), whose sum is σ = 5271598080. Its totient is φ = 2583271680.

The previous prime is 3914221781. The next prime is 3914221799. The reversal of 3914221791 is 1971224193.

It is a de Polignac number, because none of the positive numbers 2^k-3914221791 is a prime.

It is a super-2 number, since 2×3914221791² = 30642264458278495362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3914221799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133906 + ... + 160496.

It is an arithmetic number, because the mean of its divisors is an integer number (329474880).

Almost surely, 2^3914221791 is an apocalyptic number.

3914221791 is a deficient number, since it is larger than the sum of its proper divisors (1357376289).

3914221791 is a wasteful number, since it uses less digits than its factorization.

3914221791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27086.

The product of its digits is 27216, while the sum is 39.

The square root of 3914221791 is about 62563.7418238391. The cubic root of 3914221791 is about 1575.9719259807.

The spelling of 3914221791 in words is "three billion, nine hundred fourteen million, two hundred twenty-one thousand, seven hundred ninety-one".