409894351793 has 2 divisors, whose sum is σ = 409894351794. Its totient is φ = 409894351792.

The previous prime is 409894351759. The next prime is 409894351807. The reversal of 409894351793 is 397153498904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248574039184 + 161320312609 = 498572^2 + 401647^2 .

It is a cyclic number.

It is not a de Polignac number, because 409894351793 - 2²² = 409890157489 is a prime.

It is not a weakly prime, because it can be changed into another prime (409894351703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204947175896 + 204947175897.

It is an arithmetic number, because the mean of its divisors is an integer number (204947175897).

Almost surely, 2^409894351793 is an apocalyptic number.

It is an amenable number.

409894351793 is a deficient number, since it is larger than the sum of its proper divisors (1).

409894351793 is an equidigital number, since it uses as much as digits as its factorization.

409894351793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29393280, while the sum is 62.

The spelling of 409894351793 in words is "four hundred nine billion, eight hundred ninety-four million, three hundred fifty-one thousand, seven hundred ninety-three".