40147493 has 2 divisors, whose sum is σ = 40147494. Its totient is φ = 40147492.

The previous prime is 40147483. The next prime is 40147501. The reversal of 40147493 is 39474104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22448644 + 17698849 = 4738^2 + 4207^2 .

It is a cyclic number.

It is not a de Polignac number, because 40147493 - 2⁴ = 40147477 is a prime.

It is a super-2 number, since 2×40147493² = 3223642388370098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40147403) 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 as a sum of consecutive naturals, namely, 20073746 + 20073747.

It is an arithmetic number, because the mean of its divisors is an integer number (20073747).

Almost surely, 2^40147493 is an apocalyptic number.

It is an amenable number.

40147493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40147493 is an equidigital number, since it uses as much as digits as its factorization.

40147493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 40147493 is about 6336.2049367109. The cubic root of 40147493 is about 342.4150228737.

The spelling of 40147493 in words is "forty million, one hundred forty-seven thousand, four hundred ninety-three".