40055957 has 2 divisors, whose sum is σ = 40055958. Its totient is φ = 40055956.

The previous prime is 40055909. The next prime is 40055959. The reversal of 40055957 is 75955004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38056561 + 1999396 = 6169^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 40055957 - 2¹⁰ = 40054933 is a prime.

Together with 40055959, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40055959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20027978 + 20027979.

It is an arithmetic number, because the mean of its divisors is an integer number (20027979).

Almost surely, 2^40055957 is an apocalyptic number.

It is an amenable number.

40055957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40055957 is an equidigital number, since it uses as much as digits as its factorization.

40055957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 40055957 is about 6328.9775635564. The cubic root of 40055957 is about 342.1545902352.

The spelling of 40055957 in words is "forty million, fifty-five thousand, nine hundred fifty-seven".