40480991 has 2 divisors, whose sum is σ = 40480992. Its totient is φ = 40480990.

The previous prime is 40480949. The next prime is 40481033. The reversal of 40480991 is 19908404.

It is a balanced prime because it is at equal distance from previous prime (40480949) and next prime (40481033).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40480991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40480091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20240495 + 20240496.

It is an arithmetic number, because the mean of its divisors is an integer number (20240496).

Almost surely, 2^40480991 is an apocalyptic number.

40480991 is a deficient number, since it is larger than the sum of its proper divisors (1).

40480991 is an equidigital number, since it uses as much as digits as its factorization.

40480991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 40480991 is about 6362.4673673033. The cubic root of 40480991 is about 343.3605362763.

The spelling of 40480991 in words is "forty million, four hundred eighty thousand, nine hundred ninety-one".