39957253 has 4 divisors (see below), whose sum is σ = 45665440. Its totient is φ = 34249068.

The previous prime is 39957251. The next prime is 39957263. The reversal of 39957253 is 35275993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35275993 = 137 ⋅257489.

It is not a de Polignac number, because 39957253 - 2¹ = 39957251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39957251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854083 + ... + 2854096.

It is an arithmetic number, because the mean of its divisors is an integer number (11416360).

Almost surely, 2^39957253 is an apocalyptic number.

It is an amenable number.

39957253 is a deficient number, since it is larger than the sum of its proper divisors (5708187).

39957253 is an equidigital number, since it uses as much as digits as its factorization.

39957253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708186.

The product of its digits is 255150, while the sum is 43.

The square root of 39957253 is about 6321.1749698929. The cubic root of 39957253 is about 341.8733186753.

The spelling of 39957253 in words is "thirty-nine million, nine hundred fifty-seven thousand, two hundred fifty-three".