40349951 has 2 divisors, whose sum is σ = 40349952. Its totient is φ = 40349950.

The previous prime is 40349929. The next prime is 40349989. The reversal of 40349951 is 15994304.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40349951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40349251) 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, 20174975 + 20174976.

It is an arithmetic number, because the mean of its divisors is an integer number (20174976).

Almost surely, 2^40349951 is an apocalyptic number.

40349951 is a deficient number, since it is larger than the sum of its proper divisors (1).

40349951 is an equidigital number, since it uses as much as digits as its factorization.

40349951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 40349951 is about 6352.1611283090. The cubic root of 40349951 is about 342.9896411914.

The spelling of 40349951 in words is "forty million, three hundred forty-nine thousand, nine hundred fifty-one".