4132321891 has 2 divisors, whose sum is σ = 4132321892. Its totient is φ = 4132321890.

The previous prime is 4132321889. The next prime is 4132321901. The reversal of 4132321891 is 1981232314.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4132321891 - 2¹ = 4132321889 is a prime.

Together with 4132321889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4132321811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2066160945 + 2066160946.

It is an arithmetic number, because the mean of its divisors is an integer number (2066160946).

Almost surely, 2^4132321891 is an apocalyptic number.

4132321891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4132321891 is an equidigital number, since it uses as much as digits as its factorization.

4132321891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 4132321891 is about 64283.1384656972. The cubic root of 4132321891 is about 1604.7155017647.

The spelling of 4132321891 in words is "four billion, one hundred thirty-two million, three hundred twenty-one thousand, eight hundred ninety-one".