40406747 has 2 divisors, whose sum is σ = 40406748. Its totient is φ = 40406746.

The previous prime is 40406687. The next prime is 40406753. The reversal of 40406747 is 74760404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40406747 - 2⁸ = 40406491 is a prime.

It is not a weakly prime, because it can be changed into another prime (40406647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20203373 + 20203374.

It is an arithmetic number, because the mean of its divisors is an integer number (20203374).

Almost surely, 2^40406747 is an apocalyptic number.

40406747 is a deficient number, since it is larger than the sum of its proper divisors (1).

40406747 is an equidigital number, since it uses as much as digits as its factorization.

40406747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 40406747 is about 6356.6301607062. The cubic root of 40406747 is about 343.1504948083.

The spelling of 40406747 in words is "forty million, four hundred six thousand, seven hundred forty-seven".