461111381 has 2 divisors, whose sum is σ = 461111382. Its totient is φ = 461111380.

The previous prime is 461111377. The next prime is 461111389. The reversal of 461111381 is 183111164.

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., 360430225 + 100681156 = 18985^2 + 10034^2 .

It is a cyclic number.

It is not a de Polignac number, because 461111381 - 2² = 461111377 is a prime.

It is a super-2 number, since 2×461111381² = 425247411375454322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 461111381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461111389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230555690 + 230555691.

It is an arithmetic number, because the mean of its divisors is an integer number (230555691).

Almost surely, 2^461111381 is an apocalyptic number.

It is an amenable number.

461111381 is a deficient number, since it is larger than the sum of its proper divisors (1).

461111381 is an equidigital number, since it uses as much as digits as its factorization.

461111381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 26.

The square root of 461111381 is about 21473.5041621064. The cubic root of 461111381 is about 772.5654471280.

The spelling of 461111381 in words is "four hundred sixty-one million, one hundred eleven thousand, three hundred eighty-one".