981258133 has 2 divisors, whose sum is σ = 981258134. Its totient is φ = 981258132.

The previous prime is 981258077. The next prime is 981258149. The reversal of 981258133 is 331852189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 911919204 + 69338929 = 30198^2 + 8327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981258133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981258163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490629066 + 490629067.

It is an arithmetic number, because the mean of its divisors is an integer number (490629067).

Almost surely, 2^981258133 is an apocalyptic number.

It is an amenable number.

981258133 is a deficient number, since it is larger than the sum of its proper divisors (1).

981258133 is an equidigital number, since it uses as much as digits as its factorization.

981258133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 981258133 is about 31325.0400318978. The cubic root of 981258133 is about 993.7132708601.

The spelling of 981258133 in words is "nine hundred eighty-one million, two hundred fifty-eight thousand, one hundred thirty-three".