40147957 has 2 divisors, whose sum is σ = 40147958. Its totient is φ = 40147956.

The previous prime is 40147927. The next prime is 40147993. The reversal of 40147957 is 75974104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33802596 + 6345361 = 5814^2 + 2519^2 .

It is a cyclic number.

It is not a de Polignac number, because 40147957 - 2¹⁹ = 39623669 is a prime.

It is a super-2 number, since 2×40147957² = 3223716902547698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40147927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20073978 + 20073979.

It is an arithmetic number, because the mean of its divisors is an integer number (20073979).

Almost surely, 2^40147957 is an apocalyptic number.

It is an amenable number.

40147957 is a deficient number, since it is larger than the sum of its proper divisors (1).

40147957 is an equidigital number, since it uses as much as digits as its factorization.

40147957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 40147957 is about 6336.2415515825. The cubic root of 40147957 is about 342.4163420092.

The spelling of 40147957 in words is "forty million, one hundred forty-seven thousand, nine hundred fifty-seven".