40249487 has 2 divisors, whose sum is σ = 40249488. Its totient is φ = 40249486.

The previous prime is 40249483. The next prime is 40249511. The reversal of 40249487 is 78494204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40249487 - 2² = 40249483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40249487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40249483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20124743 + 20124744.

It is an arithmetic number, because the mean of its divisors is an integer number (20124744).

Almost surely, 2^40249487 is an apocalyptic number.

40249487 is a deficient number, since it is larger than the sum of its proper divisors (1).

40249487 is an equidigital number, since it uses as much as digits as its factorization.

40249487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 40249487 is about 6344.2483400321. The cubic root of 40249487 is about 342.7047441162.

The spelling of 40249487 in words is "forty million, two hundred forty-nine thousand, four hundred eighty-seven".