40257983 has 2 divisors, whose sum is σ = 40257984. Its totient is φ = 40257982.

The previous prime is 40257947. The next prime is 40258013. The reversal of 40257983 is 38975204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40257983 - 2¹⁶ = 40192447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40257913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20128991 + 20128992.

It is an arithmetic number, because the mean of its divisors is an integer number (20128992).

Almost surely, 2^40257983 is an apocalyptic number.

40257983 is a deficient number, since it is larger than the sum of its proper divisors (1).

40257983 is an equidigital number, since it uses as much as digits as its factorization.

40257983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 40257983 is about 6344.9178875695. The cubic root of 40257983 is about 342.7288555181.

It can be divided in two parts, 402 and 57983, that added together give a palindrome (58385).

The spelling of 40257983 in words is "forty million, two hundred fifty-seven thousand, nine hundred eighty-three".