46783981 has 2 divisors, whose sum is σ = 46783982. Its totient is φ = 46783980.

The previous prime is 46783969. The next prime is 46783987. The reversal of 46783981 is 18938764.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27730756 + 19053225 = 5266^2 + 4365^2 .

It is a cyclic number.

It is not a de Polignac number, because 46783981 - 2²⁵ = 13229549 is a prime.

It is a super-2 number, since 2×46783981² = 4377481756416722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46783987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23391990 + 23391991.

It is an arithmetic number, because the mean of its divisors is an integer number (23391991).

Almost surely, 2^46783981 is an apocalyptic number.

It is an amenable number.

46783981 is a deficient number, since it is larger than the sum of its proper divisors (1).

46783981 is an equidigital number, since it uses as much as digits as its factorization.

46783981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 46783981 is about 6839.8816510229. The cubic root of 46783981 is about 360.3288687177.

It can be divided in two parts, 467 and 83981, that added together give a palindrome (84448).

The spelling of 46783981 in words is "forty-six million, seven hundred eighty-three thousand, nine hundred eighty-one".