417934991 has 2 divisors, whose sum is σ = 417934992. Its totient is φ = 417934990.

The previous prime is 417934981. The next prime is 417934997. The reversal of 417934991 is 199439714.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 417934991 - 2¹⁴ = 417918607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (417934997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208967495 + 208967496.

It is an arithmetic number, because the mean of its divisors is an integer number (208967496).

Almost surely, 2^417934991 is an apocalyptic number.

417934991 is a deficient number, since it is larger than the sum of its proper divisors (1).

417934991 is an equidigital number, since it uses as much as digits as its factorization.

417934991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 417934991 is about 20443.4583913779. The cubic root of 417934991 is about 747.6578733893.

The spelling of 417934991 in words is "four hundred seventeen million, nine hundred thirty-four thousand, nine hundred ninety-one".