40045487 has 2 divisors, whose sum is σ = 40045488. Its totient is φ = 40045486.

The previous prime is 40045441. The next prime is 40045493. The reversal of 40045487 is 78454004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40045487 - 2¹⁴ = 40029103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40045987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20022743 + 20022744.

It is an arithmetic number, because the mean of its divisors is an integer number (20022744).

Almost surely, 2^40045487 is an apocalyptic number.

40045487 is a deficient number, since it is larger than the sum of its proper divisors (1).

40045487 is an equidigital number, since it uses as much as digits as its factorization.

40045487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 40045487 is about 6328.1503616776. The cubic root of 40045487 is about 342.1247763532.

The spelling of 40045487 in words is "forty million, forty-five thousand, four hundred eighty-seven".