942181997 has 2 divisors, whose sum is σ = 942181998. Its totient is φ = 942181996.

The previous prime is 942181979. The next prime is 942182057. The reversal of 942181997 is 799181249.

Together with previous prime (942181979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723556201 + 218625796 = 26899^2 + 14786^2 .

It is a cyclic number.

It is not a de Polignac number, because 942181997 - 2⁸ = 942181741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (942181297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471090998 + 471090999.

It is an arithmetic number, because the mean of its divisors is an integer number (471090999).

Almost surely, 2^942181997 is an apocalyptic number.

It is an amenable number.

942181997 is a deficient number, since it is larger than the sum of its proper divisors (1).

942181997 is an equidigital number, since it uses as much as digits as its factorization.

942181997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 50.

The square root of 942181997 is about 30694.9832545972. The cubic root of 942181997 is about 980.3434853852.

The spelling of 942181997 in words is "nine hundred forty-two million, one hundred eighty-one thousand, nine hundred ninety-seven".