409384198987 has 2 divisors, whose sum is σ = 409384198988. Its totient is φ = 409384198986.

The previous prime is 409384198849. The next prime is 409384199087. The reversal of 409384198987 is 789891483904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409384198987 - 2³¹ = 407236715339 is a prime.

It is a super-2 number, since 2×409384198987² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (409384198787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204692099493 + 204692099494.

It is an arithmetic number, because the mean of its divisors is an integer number (204692099494).

Almost surely, 2^409384198987 is an apocalyptic number.

409384198987 is a deficient number, since it is larger than the sum of its proper divisors (1).

409384198987 is an equidigital number, since it uses as much as digits as its factorization.

409384198987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125411328, while the sum is 70.

The spelling of 409384198987 in words is "four hundred nine billion, three hundred eighty-four million, one hundred ninety-eight thousand, nine hundred eighty-seven".