42733993 has 2 divisors, whose sum is σ = 42733994. Its totient is φ = 42733992.

The previous prime is 42733969. The next prime is 42733997. The reversal of 42733993 is 39933724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26347689 + 16386304 = 5133^2 + 4048^2 .

It is a cyclic number.

It is not a de Polignac number, because 42733993 - 2²⁵ = 9179561 is a prime.

It is equal to p_2589466 and since 42733993 and 2589466 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42733997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21366996 + 21366997.

It is an arithmetic number, because the mean of its divisors is an integer number (21366997).

Almost surely, 2^42733993 is an apocalyptic number.

It is an amenable number.

42733993 is a deficient number, since it is larger than the sum of its proper divisors (1).

42733993 is an equidigital number, since it uses as much as digits as its factorization.

42733993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 40.

The square root of 42733993 is about 6537.1242148211. The cubic root of 42733993 is about 349.6158860843.

The spelling of 42733993 in words is "forty-two million, seven hundred thirty-three thousand, nine hundred ninety-three".