40102393 has 2 divisors, whose sum is σ = 40102394. Its totient is φ = 40102392.

The previous prime is 40102379. The next prime is 40102411. The reversal of 40102393 is 39320104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31505769 + 8596624 = 5613^2 + 2932^2 .

It is a cyclic number.

It is not a de Polignac number, because 40102393 - 2⁹ = 40101881 is a prime.

It is not a weakly prime, because it can be changed into another prime (40102343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20051196 + 20051197.

It is an arithmetic number, because the mean of its divisors is an integer number (20051197).

Almost surely, 2^40102393 is an apocalyptic number.

It is an amenable number.

40102393 is a deficient number, since it is larger than the sum of its proper divisors (1).

40102393 is an equidigital number, since it uses as much as digits as its factorization.

40102393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 40102393 is about 6332.6450240006. The cubic root of 40102393 is about 342.2867566348.

Adding to 40102393 its reverse (39320104), we get a palindrome (79422497).

The spelling of 40102393 in words is "forty million, one hundred two thousand, three hundred ninety-three".