419697991 has 2 divisors, whose sum is σ = 419697992. Its totient is φ = 419697990.

The previous prime is 419697979. The next prime is 419698003. The reversal of 419697991 is 199796914.

It is a balanced prime because it is at equal distance from previous prime (419697979) and next prime (419698003).

It is a cyclic number.

It is not a de Polignac number, because 419697991 - 2¹³ = 419689799 is a prime.

It is a super-2 number, since 2×419697991² = 352292807298872162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (419697961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209848995 + 209848996.

It is an arithmetic number, because the mean of its divisors is an integer number (209848996).

Almost surely, 2^419697991 is an apocalyptic number.

419697991 is a deficient number, since it is larger than the sum of its proper divisors (1).

419697991 is an equidigital number, since it uses as much as digits as its factorization.

419697991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 55.

The square root of 419697991 is about 20486.5319417416. The cubic root of 419697991 is about 748.7076951357.

The spelling of 419697991 in words is "four hundred nineteen million, six hundred ninety-seven thousand, nine hundred ninety-one".