4391896381 has 2 divisors, whose sum is σ = 4391896382. Its totient is φ = 4391896380.

The previous prime is 4391896349. The next prime is 4391896441. The reversal of 4391896381 is 1836981934.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2589893881 + 1802002500 = 50891^2 + 42450^2 .

It is a cyclic number.

It is not a de Polignac number, because 4391896381 - 2⁵ = 4391896349 is a prime.

It is a super-2 number, since 2×4391896381² = 38577507642881794322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4391896981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195948190 + 2195948191.

It is an arithmetic number, because the mean of its divisors is an integer number (2195948191).

Almost surely, 2^4391896381 is an apocalyptic number.

It is an amenable number.

4391896381 is a deficient number, since it is larger than the sum of its proper divisors (1).

4391896381 is an equidigital number, since it uses as much as digits as its factorization.

4391896381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 52.

The square root of 4391896381 is about 66271.3843298901. The cubic root of 4391896381 is about 1637.6359430755.

The spelling of 4391896381 in words is "four billion, three hundred ninety-one million, eight hundred ninety-six thousand, three hundred eighty-one".