942121993 has 2 divisors, whose sum is σ = 942121994. Its totient is φ = 942121992.

The previous prime is 942121951. The next prime is 942122017. The reversal of 942121993 is 399121249.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558471424 + 383650569 = 23632^2 + 19587^2 .

It is a cyclic number.

It is not a de Polignac number, because 942121993 - 2²⁹ = 405251081 is a prime.

It is not a weakly prime, because it can be changed into another prime (942121913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471060996 + 471060997.

It is an arithmetic number, because the mean of its divisors is an integer number (471060997).

Almost surely, 2^942121993 is an apocalyptic number.

It is an amenable number.

942121993 is a deficient number, since it is larger than the sum of its proper divisors (1).

942121993 is an equidigital number, since it uses as much as digits as its factorization.

942121993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 40.

The square root of 942121993 is about 30694.0058154683. The cubic root of 942121993 is about 980.3226734898.

The spelling of 942121993 in words is "nine hundred forty-two million, one hundred twenty-one thousand, nine hundred ninety-three".