942694981 has 2 divisors, whose sum is σ = 942694982. Its totient is φ = 942694980.

The previous prime is 942694957. The next prime is 942695009. The reversal of 942694981 is 189496249.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 939422500 + 3272481 = 30650^2 + 1809^2 .

It is an emirp because it is prime and its reverse (189496249) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-942694981 is a prime.

It is a super-2 number, since 2×942694981² = 1777347654405180722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (942694901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471347490 + 471347491.

It is an arithmetic number, because the mean of its divisors is an integer number (471347491).

Almost surely, 2^942694981 is an apocalyptic number.

It is an amenable number.

942694981 is a deficient number, since it is larger than the sum of its proper divisors (1).

942694981 is an equidigital number, since it uses as much as digits as its factorization.

942694981 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 942694981 is about 30703.3382712695. The cubic root of 942694981 is about 980.5213736210.

The spelling of 942694981 in words is "nine hundred forty-two million, six hundred ninety-four thousand, nine hundred eighty-one".