40172303 has 2 divisors, whose sum is σ = 40172304. Its totient is φ = 40172302.

The previous prime is 40172287. The next prime is 40172317. The reversal of 40172303 is 30327104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40172303 - 2⁴ = 40172287 is a prime.

It is a super-2 number, since 2×40172303² = 3227627856647618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40172383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20086151 + 20086152.

It is an arithmetic number, because the mean of its divisors is an integer number (20086152).

Almost surely, 2^40172303 is an apocalyptic number.

40172303 is a deficient number, since it is larger than the sum of its proper divisors (1).

40172303 is an equidigital number, since it uses as much as digits as its factorization.

40172303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 40172303 is about 6338.1624308627. The cubic root of 40172303 is about 342.4855425726.

Adding to 40172303 its reverse (30327104), we get a palindrome (70499407).

The spelling of 40172303 in words is "forty million, one hundred seventy-two thousand, three hundred three".