40004651 has 2 divisors, whose sum is σ = 40004652. Its totient is φ = 40004650.

The previous prime is 40004611. The next prime is 40004669. The reversal of 40004651 is 15640004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40004651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40004611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20002325 + 20002326.

It is an arithmetic number, because the mean of its divisors is an integer number (20002326).

Almost surely, 2^40004651 is an apocalyptic number.

40004651 is a deficient number, since it is larger than the sum of its proper divisors (1).

40004651 is an equidigital number, since it uses as much as digits as its factorization.

40004651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40004651 is about 6324.9230034839. The cubic root of 40004651 is about 342.0084439852.

Adding to 40004651 its reverse (15640004), we get a palindrome (55644655).

The spelling of 40004651 in words is "forty million, four thousand, six hundred fifty-one".