40759991 has 2 divisors, whose sum is σ = 40759992. Its totient is φ = 40759990.

The previous prime is 40759981. The next prime is 40760023. The reversal of 40759991 is 19995704.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40759991 is a prime.

It is a super-2 number, since 2×40759991² = 3322753732640162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40759981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20379995 + 20379996.

It is an arithmetic number, because the mean of its divisors is an integer number (20379996).

Almost surely, 2^40759991 is an apocalyptic number.

40759991 is a deficient number, since it is larger than the sum of its proper divisors (1).

40759991 is an equidigital number, since it uses as much as digits as its factorization.

40759991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 40759991 is about 6384.3551749570. The cubic root of 40759991 is about 344.1475587211.

The spelling of 40759991 in words is "forty million, seven hundred fifty-nine thousand, nine hundred ninety-one".