83450981 has 2 divisors, whose sum is σ = 83450982. Its totient is φ = 83450980.

The previous prime is 83450929. The next prime is 83450987. The reversal of 83450981 is 18905438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83429956 + 21025 = 9134^2 + 145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83450981 is a prime.

It is a super-2 number, since 2×83450981² = 13928132459724722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83450987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41725490 + 41725491.

It is an arithmetic number, because the mean of its divisors is an integer number (41725491).

Almost surely, 2^83450981 is an apocalyptic number.

It is an amenable number.

83450981 is a deficient number, since it is larger than the sum of its proper divisors (1).

83450981 is an equidigital number, since it uses as much as digits as its factorization.

83450981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 83450981 is about 9135.1508471399. The cubic root of 83450981 is about 436.9956851210.

It can be divided in two parts, 834 and 50981, that added together give a palindrome (51815).

The spelling of 83450981 in words is "eighty-three million, four hundred fifty thousand, nine hundred eighty-one".