40547489 has 2 divisors, whose sum is σ = 40547490. Its totient is φ = 40547488.

The previous prime is 40547477. The next prime is 40547497. The reversal of 40547489 is 98474504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23116864 + 17430625 = 4808^2 + 4175^2 .

It is a cyclic number.

It is not a de Polignac number, because 40547489 - 2⁸ = 40547233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40547789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20273744 + 20273745.

It is an arithmetic number, because the mean of its divisors is an integer number (20273745).

Almost surely, 2^40547489 is an apocalyptic number.

It is an amenable number.

40547489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40547489 is an equidigital number, since it uses as much as digits as its factorization.

40547489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 40547489 is about 6367.6910257958. The cubic root of 40547489 is about 343.5484458550.

The spelling of 40547489 in words is "forty million, five hundred forty-seven thousand, four hundred eighty-nine".