40345273 has 2 divisors, whose sum is σ = 40345274. Its totient is φ = 40345272.

The previous prime is 40345231. The next prime is 40345297. The reversal of 40345273 is 37254304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32353344 + 7991929 = 5688^2 + 2827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40345273 is a prime.

It is not a weakly prime, because it can be changed into another prime (40349273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20172636 + 20172637.

It is an arithmetic number, because the mean of its divisors is an integer number (20172637).

Almost surely, 2^40345273 is an apocalyptic number.

It is an amenable number.

40345273 is a deficient number, since it is larger than the sum of its proper divisors (1).

40345273 is an equidigital number, since it uses as much as digits as its factorization.

40345273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 40345273 is about 6351.7928964978. The cubic root of 40345273 is about 342.9763857639.

Adding to 40345273 its reverse (37254304), we get a palindrome (77599577).

The spelling of 40345273 in words is "forty million, three hundred forty-five thousand, two hundred seventy-three".