40442593 has 2 divisors, whose sum is σ = 40442594. Its totient is φ = 40442592.

The previous prime is 40442561. The next prime is 40442603. The reversal of 40442593 is 39524404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23203489 + 17239104 = 4817^2 + 4152^2 .

It is a cyclic number.

It is not a de Polignac number, because 40442593 - 2⁵ = 40442561 is a prime.

It is not a weakly prime, because it can be changed into another prime (40443593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20221296 + 20221297.

It is an arithmetic number, because the mean of its divisors is an integer number (20221297).

Almost surely, 2^40442593 is an apocalyptic number.

It is an amenable number.

40442593 is a deficient number, since it is larger than the sum of its proper divisors (1).

40442593 is an equidigital number, since it uses as much as digits as its factorization.

40442593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 40442593 is about 6359.4491113618. The cubic root of 40442593 is about 343.2519377433.

Adding to 40442593 its reverse (39524404), we get a palindrome (79966997).

The spelling of 40442593 in words is "forty million, four hundred forty-two thousand, five hundred ninety-three".