409812479 has 2 divisors, whose sum is σ = 409812480. Its totient is φ = 409812478.

The previous prime is 409812443. The next prime is 409812503. The reversal of 409812479 is 974218904.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 409812479 - 2²⁴ = 393035263 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409812379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204906239 + 204906240.

It is an arithmetic number, because the mean of its divisors is an integer number (204906240).

Almost surely, 2^409812479 is an apocalyptic number.

409812479 is a deficient number, since it is larger than the sum of its proper divisors (1).

409812479 is an equidigital number, since it uses as much as digits as its factorization.

409812479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 409812479 is about 20243.8257006921. The cubic root of 409812479 is about 742.7826078659.

The spelling of 409812479 in words is "four hundred nine million, eight hundred twelve thousand, four hundred seventy-nine".