813420447 has 16 divisors (see below), whose sum is σ = 1243737600. Its totient is φ = 463221792.

The previous prime is 813420409. The next prime is 813420451. The reversal of 813420447 is 744024318.

It is not a de Polignac number, because 813420447 - 2⁶ = 813420383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813420467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59947 + ... + 72252.

It is an arithmetic number, because the mean of its divisors is an integer number (77733600).

Almost surely, 2^813420447 is an apocalyptic number.

813420447 is a deficient number, since it is larger than the sum of its proper divisors (430317153).

813420447 is a wasteful number, since it uses less digits than its factorization.

813420447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132502.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 813420447 is about 28520.5267658225. The cubic root of 813420447 is about 933.4800232732.

The spelling of 813420447 in words is "eight hundred thirteen million, four hundred twenty thousand, four hundred forty-seven".